Peanut Brittle

Peanut Brittle is a crispy, crunchy candy treat that is loaded with peanuts for a sweet and salty goodie to enjoy. Try my Peanut Butter Cookies for another nutty dessert. 

Peanut Brittle

You still have time to make this peanut brittle before National Peanut Brittle Day, which is January 26th! Making your own candy is worth it; it tastes so much better than the storebought stuff. But, how did this become so popular? One story is that in the late 1800s, a woman was making taffy. But, she accidentally used baking soda instead of cream of tartar. She didn’t want to be wasteful, so she continued cooking until she had this crunchy treat.

Classic Peanut Brittle Recipe in Basket

Peanut Brittle Ingredients

Making homemade peanut brittle should not be intimidating. It’s one of the easier candies to make. But, as with other candies, it’s about science and temperature.

Granulated Sugar: When sugar is heated, a process known as sugar inversion happens. This causes the sugar to change into liquid sugar and has that lovely aroma and darker color. It’s more involved chemistry than that, but hey, I trust the process! 

Corn Syrup: Corn syrup is an important ingredient in candy recipes, including this one. It is processed from cornstarch and gives the candy a smooth, glossy texture. 

Baking Soda: Again, it’s all about the chemistry when it comes to adding baking soda. It is added at the end to make sure the heated sugar has accumulated enough acid to cause a reaction with the baking soda. This reaction, in turn, makes the sugar brittle and porous enough to make it easy to bite into and chew.

Candy Thermometer: Yes, I know this is not an ingredient, but it is just as important when it comes to this recipe. A candy thermometer, also known as a deep-fry thermometer or sugar thermometer, is used to measure the temperature of a sugar solution. It is definitely an important tool to have when making candy. And, since this recipe is all about science, accuracy is key.

Pouring Classic Peanut Brittle on Greased Pan

How to Make Peanut Brittle

Before you start making peanut brittle, measure out the butter, baking soda, and vanilla and set them aside. Timing is crucial when adding these ingredients, so you will not have time to measure and add when the time comes. To begin, get the sugar inversion going. Add the sugar, corn syrup, and water in a medium, heavy-bottom saucepan. Bring the mixture to a boil over medium heat.

Stir the mixture until the sugar is dissolved, and if you haven’t already, insert a candy thermometer into the mixture. Once the temperature has reached 280°F, add the salted peanuts. Continue cooking, stirring frequently, until the mixture reaches 300°F.

Overhead of Classic Peanut Brittle

As soon as the temperature is at 300°F, remove the pot from heat and quickly add the butter, baking soda, and vanilla. The mixture will start to foam, but that shows you the reaction is happening (it’s a good thing). Immediately pour the mixture onto a baking sheet. I recommend pouring in a circular pattern to evenly distribute the peanuts.

Use a couple of forks to spread and thin out the peanut brittle. Let it sit until cool. Finally, use your hands, the back of a wooden spoon or even a couple of gentle taps with a cooking mallet to break apart the pieces. Enjoy! Store peanut brittle in an airtight container at room temperature for up to 6 weeks.

Hand Holding Classic Peanut Brittle

Looking for More Candy Recipes?

Butter Pecan Fudge

Homemade Marshmallows

Grandma’s Perfect Caramels

Candied Pecans

Peanut Brittle

Peanut Brittle is a crispy, crunchy candy treat that is loaded with peanuts for a sweet and salty goodie to enjoy.
Prep Time: 10 minutes
Cook Time: 15 minutes
Resting Time: 30 minutes
Total Time: 55 minutes
Course: Dessert, Snack
Cuisine: American
Keyword: Peanut Brittle
Calories: 131kcal
Author: Amanda Rettke–


  • 1 cup (200g) granulated sugar
  • ½ cup (170g) light corn syrup
  • ¼ cup water
  • 1 cup salted peanuts
  • 2 tablespoons butter, room temperature
  • 1 teaspoon baking soda
  • 1 teaspoon vanilla extract


  • Spray a baking sheet with nonstick cooking spray. Set aside. Measure out the butter, baking soda, and vanilla ahead of time so it is ready to go when needed.
  • In a medium, heavy-bottom pot, add the sugar, corn syrup, and water. Bring the mixture to a boil over medium-high heat, stirring until the sugar is dissolved.
  • Place a candy thermometer into the mixture, making sure the bulb does not touch the bottom of the pot. When the temperature reaches 280°F, add the salted peanuts.
  • Continue cooking, stirring frequently, until the temperature reads 300°F.
  • Remove the pot from the heat. Wasting no time, stir in the butter, baking soda, and vanilla. (The mixture may foam because of the baking soda's reaction to the sugar.) Immediately pour the mixture in a circular pattern onto the prepared baking sheet. This will help evenly distribute the nuts.
  • As the peanut brittle is cooling, stretch it out by using two buttered forks to gently make it thinner. The thinner it is, the more brittle it will be. Let cool.
  • Once cooled, use your hands or the handle of a wooden spoon to break it apart into pieces. Store peanut brittle at room temperature in an airtight container for up to 6 weeks.


Calories: 131kcal
Tried this recipe?Let us know how it was!

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