Buttery, crunchy homemade candy packed with roasted peanuts and ready in 45 minutes.
There is a specific satisfaction in watching sugar transform from white crystals into a golden amber liquid. Here in Austin, peanut brittle is an absolute staple during the holiday season, often wrapped in cellophane and tied with rustic twine for neighbors and friends. This recipe delivers that classic snap-sweet, salty, and packed with roasted nuts-without sticking to your teeth. It is a candy store classic that is surprisingly achievable at home if you have the right tools and a little patience. While sugar work can feel intimidating, the result is a generous batch of golden candy that tastes infinitely better than anything you can buy in a box.
The most critical factor for success is having every single ingredient measured and placed next to the stove before you turn the burner on. Once the sugar syrup hits the hard-crack stage (300°F), the transition happens in seconds; if you are scrambling to measure baking soda or vanilla, your brittle will burn before you can pour it.
The Perfect Homemade Candy

Why You'll Love This Recipe
- Perfect Texture: The addition of baking soda at the very end aerates the sugar syrup, creating tiny bubbles that ensure the brittle shatters pleasantly rather than being rock hard.
- High Yield: This recipe makes two full trays, making it the most efficient option for large-scale holiday gifting.
- Balanced Flavor: By adding butter and salt, the candy avoids being cloyingly sweet, offering a rich toffee-like profile.
- Pantry Staples: Aside from the peanuts, everything else is likely already sitting in your pantry.
Ingredients
To achieve the right chemical reaction and texture, precision is key. Here is what you need:
- Butter: You will need a total of 4 teaspoons plus ¼ cup. The 4 teaspoons are for greasing the baking sheets, and the ¼ cup adds richness to the candy itself.
- Sugar: 3 cups of standard granulated sugar provides the base.
- Light Corn Syrup: ½ cup is essential to prevent the sugar from crystallizing and becoming grainy.
- Water: 1 cup plus 1 teaspoon, divided.
- Salt: 1 teaspoon balances the sugar.
- Peanuts: 1 jar (16 ounces) of unsalted dry roasted peanuts. I prefer unsalted so I can control the sodium level myself.
- Baking Soda: 1-½ teaspoons. This is the magic ingredient that creates the foam and light texture.
- Vanilla Extract: 1 teaspoon for aromatic depth.
How to Make Peanut Brittle

Prepare Your Station and Pans
Preheat your oven to 200°F. Grease two large baking sheets with 2 teaspoons of butter each. Place these sheets in the warm oven. This is a professional trick: pouring hot candy onto a warm surface keeps it from setting instantly, buying you precious time to spread it thin.
Start the Sugar Syrup
In a large, heavy-bottomed saucepan (larger than you think you need, as the mixture will foam up later), combine the 3 cups of sugar, corn syrup, and 1 cup of water. Cook over medium heat, stirring constantly with a wooden spoon or heat-proof silicone spatula.
Cook to Soft-Ball Stage
Continue cooking until your candy thermometer reaches 240°F (the soft-ball stage). While this is happening, cube the remaining ¼ cup of butter so it melts quickly later.
Add Peanuts and Butter
Once the thermometer hits 240°F, stir in the cubed butter, salt, and the peanuts. Keep the heat on medium and continue stirring constantly. The mixture will be thick and crowded with nuts.
Cook to Hard-Crack Stage
Watch the thermometer closely. You need to cook the mixture until it reaches 300°F (the hard-crack stage). The syrup will turn a deep golden amber color. This takes patience, but do not walk away, or the peanuts will burn. Remove the saucepan from the heat immediately upon reaching temperature.
The Aeration Step
In a small bowl, combine the baking soda, the remaining 1 teaspoon of water, and the vanilla extract. Pour this mixture into the hot candy. The mixture will fizz and foam up violently-this is normal. Stir quickly and vigorously to distribute the soda.
Pour and Spread
Working quickly, pour half of the mixture onto each of the warm baking sheets. Using a buttered metal spatula, spread the candy as thin as possible, aiming for about ¼-inch thickness. If you like thinner brittle, you can gently pull the edges with two forks to stretch it.
Cool and Break
Allow the brittle to cool completely at room temperature. Once hard, snap the candy into jagged shards with your hands or tap it with the handle of a knife.
Common Mistakes to Avoid
- Cooking on High Heat: It is tempting to crank the burner to get to 300°F faster, but this will almost certainly scorch the peanuts before the sugar is ready. Patience at medium heat is required.
- Ignoring Humidity: Candy making is difficult on rainy days. High humidity can prevent the brittle from setting hard, leaving it tacky. Try to pick a dry day for this project.
- Using a Dirty Thermometer: If your thermometer has old burnt sugar on the probe, it can give inaccurate readings. Ensure it is spotless before starting.
Tips and Tricks for Success
- Calibrate Your Thermometer: Before starting, boil a pot of water and check your thermometer. It should read 212°F at sea level. If it is off, adjust your target candy temperature accordingly.
- Warming the Peanuts: If your peanuts are very cold, they can drop the temperature of the syrup too drastically. I like to keep the jar near the stove so they are at room temperature.
- Cleaning the Pot: To clean the hardened sugar out of your pot afterward, simply fill it with water and boil it on the stove. The sugar will dissolve effortlessly.
Variations
- Spicy Peanut Brittle: Add ¼ teaspoon of cayenne pepper when you add the salt for a "Texas heat" version that pairs beautifully with the sweet caramel.
- Nut Substitutions: While peanuts are traditional, this method works well with raw pecans or cashews. Since pecans are softer, add them slightly later or toast them less to avoid burning.
- Chocolate Drizzle: Once the brittle has cooled, drizzle melted semi-sweet chocolate over the top for a deluxe presentation.
How to Serve
Peanut brittle is a standalone star. Serve it in a decorative bowl during game nights or crush it up to use as a topping for vanilla bean ice cream. It also pairs unexpectedly well with a dark stout beer or strong black coffee, where the bitterness cuts through the sugar.

Make Ahead and Storage
- Storage: Moisture is the enemy of brittle. Store the broken pieces in an airtight container or tin, separated by layers of wax paper.
- Shelf Life: When stored properly in a cool, dry place, peanut brittle stays fresh and crunchy for up to 3 weeks. Do not refrigerate, as the humidity in the fridge will make it sticky.
Recipe Notes / What I Learned
During testing, I found that mixing the baking soda with the vanilla and teaspoon of water beforehand ensures no clumps of dry soda end up in the final product. It allows for a smoother, more even foam when it hits the hot syrup.
Nutrition Snapshot
One serving (approx. 1 ounce) contains roughly 140 calories, 6g fat, and 22g carbohydrates.

Peanut Brittle
Equipment
- Candy thermometer
- Large saucepan
- 2 Baking sheets
- Buttered metal spatula
- Airtight container for storage
Ingredients
Group: Ingredients
- 4 teaspoons plus ¼ cup butter, divided
- 3 cups sugar
- ½ cup light corn syrup
- 1 cup plus 1 teaspoon water, divided
- 1 teaspoon salt
- 1 jar (16 ounces) unsalted dry roasted peanuts
- 1-½ teaspoons baking soda
- 1 teaspoon vanilla extract
Instructions
- Grease 2 baking sheets with 2 teaspoons butter each and keep warm in a 200° oven.
- In a large saucepan, combine the sugar, corn syrup and 1 cup water. Cook over medium heat, stirring constantly, until a candy thermometer reaches 240° (soft-ball stage). Cube remaining ¼ cup butter. Stir in cubed butter, salt and peanuts. Continue heating, stirring constantly, until the mixture reaches 300° (hard-crack stage).
- Remove saucepan from the heat. Combine the baking soda, 1 teaspoon water and vanilla. Stir baking soda mixture into the saucepan.
- Quickly pour half the mixture over each baking sheet. Spread with a buttered metal spatula to a ¼-in. thickness. Cool completely.
- Break into pieces. Store in an airtight container.
Notes
Nutrition
FAQs
Why is my peanut brittle chewy instead of crunchy?
This usually means the sugar syrup did not reach the full 300°F (hard-crack stage). If you pull it off the heat even a few degrees too early, the sugar retains too much moisture and will be chewy and stick to your teeth.
Can I use salted peanuts?
Yes, you can use salted peanuts, but you must omit the teaspoon of added salt in the recipe. If you use both salted nuts and added salt, the final candy will be unpalatable.




