Few homemade candies have a texture quite as satisfying as peanut brittle. One moment you’re holding a glossy golden shard studded with roasted peanuts; the next comes that unmistakable snap, followed by buttery caramelized sweetness and plenty of nutty crunch.
It is also one of those Christmas candies that looks wonderfully impressive without requiring a long ingredient list. Sugar, corn syrup, peanuts, butter, vanilla and baking soda are transformed by heat into something completely different from where they began.
The key is temperature.
Peanut brittle needs to reach the hard-crack stage, around 300°F, so the cooled candy becomes crisp rather than chewy. Baking soda added at the end causes the hot candy to foam, creating tiny bubbles that give brittle its lighter, easier-to-bite texture.
Once you understand those two steps, homemade peanut brittle becomes surprisingly approachable—and an excellent addition to Christmas candy tins, dessert platters and homemade holiday gifts.
🎄 Peanut Brittle at a Glance
Prep time: 10 minutes
Cook time: About 20–25 minutes
Cooling time: 30–60 minutes
Total time: About 1 hour
Yield: Approximately 1½ pounds
Candy stage: Hard crack
Target temperature: 300°F (149°C)
🥜 Ingredients
- 2 cups granulated sugar
- 1 cup light corn syrup
- 1 cup water
- 2 cups roasted peanuts
- 2 tablespoons unsalted butter, softened
- 1 teaspoon baking soda
- 1 teaspoon pure vanilla extract
- ½ teaspoon fine salt
If you’re using salted peanuts, reduce the added salt to a generous pinch.
You can use roasted unsalted peanuts for the easiest version. Raw peanuts can also be used, but they benefit from spending more time cooking in the hot syrup and require a little more attention to ensure they develop a good roasted flavor.
🍳 Equipment You’ll Need
Candy moves quickly once it reaches the right temperature, so gather everything before switching on the stove.
You’ll need:
- Heavy-bottomed saucepan
- Reliable candy or instant-read thermometer
- Large rimmed baking sheet
- Silicone baking mat or parchment paper
- Heatproof spatula or wooden spoon
- Measuring cups and spoons
- Oven mitts
A large enough saucepan is particularly important. The mixture foams dramatically when the baking soda is added, and you want plenty of room for that expansion.
✨ Step 1: Prepare Everything First
Line a large rimmed baking sheet with a silicone baking mat or lightly buttered parchment paper.
Measure the butter, baking soda, vanilla and salt into separate small dishes and place them beside the stove.
Have the peanuts ready too.
Once your sugar reaches 300°F, there is no time to begin searching the cupboard for vanilla or measuring baking soda.
Peanut brittle rewards preparation.
🍯 Step 2: Begin the Sugar Syrup
Combine the sugar, corn syrup and water in your heavy-bottomed saucepan.
Place over medium to medium-high heat.
Stir gently at the beginning until the sugar is moistened and the mixture becomes evenly combined.
Once the syrup is boiling steadily, avoid unnecessary stirring.
Attach your candy thermometer or begin checking periodically with an accurate instant-read thermometer.
The mixture will initially look clear and watery. As the water gradually cooks away, the temperature will climb and the syrup will become increasingly concentrated.
🥜 Step 3: Add the Peanuts
When the syrup reaches approximately 270°F (132°C), carefully stir in the peanuts.
The temperature may drop temporarily.
Continue cooking while stirring regularly so the peanuts remain evenly distributed and don’t scorch against the bottom of the pan.
Now watch the temperature closely.
The mixture will begin changing from pale gold to a richer amber while the peanuts toast in the increasingly hot syrup.
Continue until the thermometer reads 300°F (149°C).
This is the hard-crack stage—the temperature responsible for brittle’s signature crisp snap.
🔥 Step 4: Remove the Pan From the Heat
As soon as the mixture reaches 300°F, remove the saucepan from the burner.
Candy temperatures continue changing quickly at this stage, so don’t leave the pan sitting over the heat while you prepare the next ingredients.
Immediately add:
- Butter
- Vanilla
- Salt
Stir carefully until the butter melts into the candy.
The mixture is extraordinarily hot, so avoid touching it or allowing it to splash onto your skin.
☁️ Step 5: Add the Baking Soda
Now sprinkle in the baking soda and stir quickly.
The candy will immediately foam, lighten and increase in volume.
This dramatic reaction is exactly what you want.
Baking soda produces tiny bubbles throughout the hot sugar mixture. Those bubbles remain trapped as the brittle cools, giving the finished candy a more porous texture instead of leaving you with an extremely dense slab of hard caramel.
Don’t keep stirring for a long time after the baking soda goes in.
A few quick turns are enough.
Then pour.
🧡 Step 6: Pour the Brittle
Carefully pour the foaming candy onto your prepared baking sheet.
Use a heatproof spatula to gently encourage it outward if necessary.
For thin, delicate brittle, spread the candy into a relatively thin layer.
For the thicker, rustic shards shown in the photograph, leave it a little deeper so the peanuts remain prominently suspended throughout each piece.
Don’t worry about creating a perfect rectangle.
Irregular edges look exactly right for homemade peanut brittle.
And work quickly—the candy begins setting almost immediately.
⏰ Step 7: Let It Cool Completely
Leave the brittle undisturbed at room temperature for approximately 30–60 minutes.
Do not put it in the refrigerator to speed things up.
As the candy cools, it will transform from a bubbling, flexible sheet into a hard golden slab.
Test an edge only after it looks completely firm and cool.
When properly made, it should break with a distinct snap rather than bend.
💥 Step 8: Break Into Rustic Pieces
Now comes the best part.
Lift the cooled brittle from the baking sheet and break it into irregular pieces with your hands.
Some can be large dramatic shards, while others will naturally break into bite-size pieces.
There is no reason to make them uniform.
In fact, the uneven pieces are part of what makes homemade brittle so attractive. The featured photograph embraces exactly that appearance: thick golden slabs with exposed peanuts, stacked casually rather than cut into perfect candy-store squares.
Collect the tiny fragments too.
They’re excellent sprinkled over ice cream or folded into cookie dough.
🌡️ Why 300°F Matters
Candy making is really a matter of controlling how much water remains in a sugar syrup.
As the syrup heats, water evaporates and the sugar becomes increasingly concentrated. Different temperature ranges create different finished textures.
Soft candies such as fudge and caramels are cooked to lower temperature stages.
Peanut brittle belongs at the opposite end of the spectrum.
Around 300–310°F, sugar reaches the hard-crack stage. Once cooled, a syrup cooked to this range becomes hard and brittle rather than soft or chewy.
That is why a thermometer is so helpful.
Trying to decide whether the sugar “looks done” introduces far more guesswork than simply watching the temperature.
🌡️ Check Your Candy Thermometer
If you make candy regularly, it’s worth knowing whether your thermometer is accurate.
Water boils at approximately 212°F at sea level, although the boiling point decreases with increasing elevation and also varies somewhat with atmospheric pressure.
You can test your thermometer in boiling water and note whether it reads close to the expected boiling temperature for your location.
If it is several degrees off, take that difference into account while cooking your brittle—or replace the thermometer.
When candy stages are separated by relatively small temperature ranges, thermometer accuracy matters.
🏔️ What About High Altitude?
Elevation affects candy making because water boils at lower temperatures as altitude increases.
If you live substantially above sea level, you may need to adjust candy temperatures accordingly rather than assuming 300°F is universally correct.
An easy approach is to determine the boiling point of water in your kitchen and adjust your target relative to the sea-level boiling point.
If high-altitude baking and candy making are part of your regular routine, keeping a note of your local adjustment near your thermometer can save plenty of guesswork.
🫧 Why Do You Add Baking Soda?
Baking soda is one of the ingredients that separates great brittle from a simple sheet of rock-hard caramel and peanuts.
When stirred into the hot candy, it creates carbon dioxide bubbles.
The mixture visibly foams and expands, and some of those microscopic air pockets remain inside as the brittle hardens.
The result is still crisp and crunchy, but its internal structure is lighter and easier to bite.
This is also why the baking soda should be waiting beside the stove before you begin.
Once the brittle hits 300°F, everything happens quickly.
🥄 Why Is Corn Syrup in Peanut Brittle?
Peanut brittle is supposed to be glossy and smooth rather than grainy.
One challenge when cooking concentrated sugar syrups is unwanted crystallization. Light corn syrup helps interfere with sugar crystals forming into a large grainy structure.
That doesn’t mean the brittle tastes like corn syrup.
Its dominant flavors remain caramelized sugar, butter, vanilla and roasted peanuts.
The corn syrup is largely there to help the candy behave.
❓ Why Is My Peanut Brittle Chewy?
Chewy brittle usually points to one major culprit: temperature.
If the sugar syrup didn’t reach the hard-crack stage, enough moisture may remain for the finished candy to stay soft or bendy rather than crisp.
That is why the thermometer should reach approximately 300°F before the candy comes off the heat.
Humidity can also work against you after the candy is made. Sugar attracts moisture from the surrounding air, which can gradually soften a perfectly good batch of brittle.
Keep the finished candy sealed in an airtight container.
🪨 Why Is My Peanut Brittle Too Hard?
Peanut brittle is supposed to be hard—but it shouldn’t feel like you’re trying to eat a sheet of glass.
Several factors help create a lighter bite.
The baking soda is particularly important because it aerates the candy.
Thickness matters too. An extraordinarily thick slab will naturally be harder to bite through than thinner pieces.
If your brittle feels unusually dense, make sure you measured the baking soda correctly and stirred it in immediately before pouring.
🧊 Why Did My Brittle Turn Sticky?
Moisture is the enemy of crisp sugar candy.
Brittle that begins wonderfully crunchy and later develops a sticky surface has often absorbed moisture from the air.
Store the candy in an airtight container at room temperature, preferably somewhere cool and dry.
Avoid leaving the candy sitting uncovered in the kitchen for days at a time.
And refrigeration usually isn’t helpful here. Moving candy in and out of a refrigerator can expose it to condensation—the exact thing you’re trying to avoid.
🌰 Can You Use Different Nuts?
Absolutely.
Once you understand the method, the same basic concept can be adapted to other nuts.
Try:
Cashew Brittle: Rich and slightly buttery, with a more delicate nut flavor.
Pecan Brittle: Particularly nice for a Southern-inspired Christmas candy assortment.
Almond Brittle: Crunchy and elegant, especially with a little almond extract.
Mixed Nut Brittle: Peanuts, cashews, almonds and pecans create an especially generous-looking candy.
Pistachio Brittle: Beautiful for Christmas because the green nuts naturally look festive.
Keep the overall quantity of nuts reasonably close to the original recipe so the sugar-to-nut ratio remains balanced.
🧂 Make Salted Peanut Brittle
Sweet and salty is particularly good with caramelized sugar.
Use roasted salted peanuts and reduce the fine salt in the recipe.
Then, immediately after spreading the hot brittle on the baking sheet, scatter a very light sprinkle of flaky sea salt across the surface.
Don’t overdo it.
A few crystals here and there are enough to make the caramel flavor seem deeper and keep the candy from tasting one-dimensionally sweet.
🍫 Make Chocolate-Dipped Peanut Brittle
For an especially indulgent Christmas candy, dip cooled peanut brittle in chocolate.
Break the brittle into medium-size pieces.
Melt dark or semisweet chocolate and dip one end of each shard into it.
Place the pieces on parchment until the chocolate sets.
You can leave the chocolate plain or sprinkle it with:
- Finely chopped peanuts
- Flaky salt
- Crushed peppermint
- Holiday sprinkles
- Toffee bits
Dark chocolate is particularly good because its bitterness balances the intensely sweet brittle.
If chocolate-and-toffee flavors are what you’re craving, you might also enjoy our Dark Chocolate Christmas Crack Recipe.
🎄 Turn It Into Christmas Peanut Brittle
Traditional golden brittle already belongs beautifully on a Christmas candy tray, but a few little additions can make it feel even more seasonal.
Add a tiny pinch of cinnamon to the vanilla and butter for warm holiday spice.
Dip some pieces in chocolate and add red-and-green sprinkles.
Drizzle white chocolate over the cooled brittle.
Or package the classic version with red ribbon and let its beautiful caramel color speak for itself.
Personally, I would keep the main batch simple.
The thick golden brittle packed with peanuts in the photograph is exactly what old-fashioned peanut brittle should look like.
🎁 Peanut Brittle Makes a Wonderful Homemade Christmas Gift
Peanut brittle is almost designed for Christmas gift giving.
It looks attractive without complicated decorating, can be made in large batches and breaks naturally into pieces that fit beautifully into tins, boxes and bags.
Once the brittle is completely cool, package it in:
- Christmas candy tins
- Clear cellophane bags
- Kraft-paper gift boxes
- Glass jars
- Small holiday treat bags
Line tins with parchment or waxed paper and arrange the brittle loosely inside.
Tie cellophane bags with red velvet, tartan or gold ribbon.
A simple handwritten tag reading “Homemade Peanut Brittle” is really all the decoration you need.
Just remember that peanuts are a major allergen, so clearly identify the candy when you’re sharing or gifting it.
🍬 Build a Homemade Christmas Candy Box
Peanut brittle becomes even more impressive when it is one part of a larger homemade candy assortment.
Combine several golden shards with creamy Traditional Eggnog Fudge, chewy Homemade Christmas Caramels and snowy pieces of Old-Fashioned Divinity.
The different textures are what make the box interesting:
- Crisp peanut brittle
- Chewy caramel
- Creamy fudge
- Airy divinity
Add parchment dividers or paper candy cups to keep the different treats separate.
It is the kind of homemade Christmas gift that rarely survives unopened for very long.
🍨 Ways to Use Broken Peanut Brittle
Don’t discard the small pieces left at the bottom of the container.
Crushed peanut brittle makes a fantastic dessert topping.
Try it over:
- Vanilla ice cream
- Chocolate ice cream
- Cheesecake
- Chocolate mousse
- Brownies
- Cupcakes
- Rice pudding
- Sundaes
You can also stir little pieces into cookie dough or sprinkle them across the top of a chocolate tart.
What begins as leftover candy crumbs can easily become the best part of another dessert.
☕ What to Serve With Peanut Brittle
Peanut brittle is intensely sweet and crunchy, so it pairs particularly well with simple drinks.
Coffee is excellent because its bitterness cuts through the caramelized sugar.
Black tea works nicely too.
For children, a cold glass of milk is difficult to beat.
And if the brittle is part of a larger Christmas party table, set it near one of our 12 Festive Christmas Punch Recipes so guests can grab a piece while filling their glasses.
🫙 How to Store Homemade Peanut Brittle
Allow the brittle to cool completely before putting it into a container.
Even a little trapped warmth can create unwanted moisture.
Place the pieces in an airtight container at room temperature, adding parchment or waxed paper between layers if necessary.
Keep the container somewhere cool and dry.
For the best texture, avoid storing brittle alongside soft cookies or other moist baked goods. Moisture can migrate from one food to another and compromise that beautiful crispness.
Give the brittle its own container and protect the crunch.
⚠️ Candy-Making Safety
Hot sugar syrup deserves respect.
At 300°F, candy is dramatically hotter than boiling water, and because the syrup is thick and sticky, contact with skin can cause serious burns.
Keep children and pets away from the stove while you’re making brittle.
Use a sturdy saucepan with plenty of extra capacity, turn the handle safely away from the edge and wear oven mitts when necessary.
Do not touch freshly poured brittle to see whether it has cooled.
Give it time.
The candy will still be extremely hot long after it stops bubbling.
❓ Peanut Brittle FAQ
What temperature should peanut brittle reach?
Peanut brittle is typically cooked to the hard-crack stage, approximately 300°F.
Why do you put baking soda in peanut brittle?
Baking soda causes the hot candy to foam and creates tiny bubbles inside the brittle, producing a lighter, more porous texture.
Why didn’t my peanut brittle get hard?
The sugar syrup may not have reached the hard-crack stage. Humidity and improper storage can also soften brittle.
Can I make peanut brittle without a candy thermometer?
Experienced candy makers sometimes use a cold-water test, but an accurate thermometer is far more reliable and makes this recipe much easier for beginners.
Should peanut brittle be refrigerated?
No refrigeration is necessary for traditional peanut brittle. Keep it in an airtight container in a cool, dry place at room temperature.
Can I double the recipe?
Candy recipes don’t always scale as predictably as ordinary cooking recipes. A larger quantity also takes longer to heat and can become difficult to spread quickly. For gift giving, making two separate batches is often easier than doubling one.
Can I use salted peanuts?
Yes. Simply reduce the additional salt in the recipe.
Why did my brittle become grainy?
Sugar crystallization may have occurred. Avoid unnecessary stirring after the syrup begins boiling and use the corn syrup called for in the recipe.
❤️ A Christmas Candy With a Perfect Snap
Peanut brittle proves that some of the best Christmas treats don’t need frosting, elaborate decorations or a dozen unusual ingredients.
A saucepan of sugar syrup reaches 300°F. Peanuts become toasted and surrounded by deep golden caramel. Butter and vanilla add richness, while a spoonful of baking soda suddenly turns a dense bubbling syrup into a light, foamy candy.
Then you pour it out and wait.
Half an hour later, the smooth sheet breaks into irregular golden shards filled with crunchy peanuts—just like the beautiful stack pictured here.
Make a batch for the Christmas candy dish, tuck some into homemade gift boxes or hide a container for yourself before everyone else discovers it.
Because once that first piece snaps, peanut brittle has a way of disappearing remarkably quickly.
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