Craving a sweet, crunchy treat? Why not try making peanut brittle at home? This classic confection is surprisingly easy to make and offers a delightful blend of salty and sweet flavors that's hard to resist. Here's a comprehensive guide to help you create perfect peanut brittle every time.
Ingredients and Equipment
Before you start, ensure you have the following ingredients and equipment ready:
- 1 cup (200g) granulated sugar
- 1 cup (240ml) light corn syrup
- 1/4 cup (57g) unsalted butter
- 1/2 teaspoon salt
- 2 cups (320g) roasted, unsalted peanuts
- 1 teaspoon baking soda
- 1 teaspoon pure vanilla extract
- Parchment paper or a silicone baking mat
- A candy thermometer
- A large, heavy-bottomed saucepan
- A wooden spoon or heat-resistant spatula
- A baking sheet
Understanding the Science Behind Peanut Brittle
Peanut brittle is a type of hard candy, which means it's made by heating sugar and other ingredients to the hard crack stage, around 300°F (150°C). This high heat causes the sugar to caramelize and turn into a glass-like substance. The baking soda added at the end of the cooking process causes the candy to foam up and become lighter in color, while the vanilla extract adds a pleasant aroma.
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Step-by-Step Instructions
Preparation
Line a baking sheet with parchment paper or a silicone baking mat and set it aside. Measure out all your ingredients and have them ready to go, as the cooking process moves quickly.
Cooking the Sugar Mixture
In a large, heavy-bottomed saucepan, combine the granulated sugar, light corn syrup, butter, and salt. Stir the mixture over medium heat until the sugar dissolves and the butter melts. Once the sugar has dissolved, clip a candy thermometer to the side of the pan and let the mixture cook undisturbed until it reaches 280°F (138°C).
At this point, you can gently stir the mixture to help it cook evenly. Continue cooking and stirring until the mixture reaches 300°F (150°C). Be patient and keep a close eye on the thermometer, as the temperature can rise quickly.

Adding the Peanuts
Once the sugar mixture reaches 300°F (150°C), carefully stir in the roasted peanuts. Cook and stir the mixture for an additional 2-3 minutes, or until the peanuts are well coated and the mixture reaches 310°F (154°C).
Adding the Leavening Agent
Remove the saucepan from the heat and carefully stir in the baking soda and vanilla extract. The mixture will foam up and lighten in color. Be cautious, as the mixture may spatter.
Spreading the Peanut Brittle
Working quickly, pour the peanut brittle mixture onto the prepared baking sheet. Using a heat-resistant spatula or wooden spoon, spread the mixture into an even layer, about 1/4-inch thick. Allow the peanut brittle to cool undisturbed for at least 30 minutes, or until completely hardened.
Breaking and Storing the Peanut Brittle
Once the peanut brittle has cooled and hardened, break it into pieces using your hands or a hammer. Store the broken pieces in an airtight container at room temperature for up to 2 weeks, or in the refrigerator for up to 4 weeks.
Tips for Perfect Peanut Brittle
| Tip | Explanation |
|---|---|
| Use a heavy-bottomed saucepan | This helps distribute heat evenly and prevents hot spots that could cause uneven cooking. |
| Don't stir the sugar mixture until it reaches 280°F (138°C) | Stirring too early can cause the sugar to crystallize, resulting in a grainy peanut brittle. |
| Use a candy thermometer | A thermometer ensures that you're cooking the sugar mixture to the correct temperature, which is crucial for achieving the right texture. |
| Work quickly when spreading the peanut brittle | The mixture sets quickly, so it's important to spread it evenly before it hardens. |
Making peanut brittle at home is a rewarding experience that yields a delicious, homemade treat. With a little practice and patience, you'll be able to create perfect peanut brittle every time. Happy cooking!