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easy microwave peanut brittle
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5 from 11 votes

Easy Microwave Peanut Brittle

This easy peanut brittle recipe is made in the microwave in just a few minutes and turns out crisp and delicious every time.
Prep Time5 mins
Cook Time8 mins
Total Time13 mins
Course: Snack
Cuisine: American
Keyword: Peanuts
Servings: 10 servings
Calories: 215kcal
Author: Laura



  • 1 cup sugar
  • 1/2 cup light corn syrup we use Karo
  • 1 cup cocktail peanuts
  • 1 tsp butter
  • 1 tsp vanilla
  • 1 tsp baking soda


  • Prepare a baking sheet with tin foil and coat with a thin layer of oil or spray with non-stick cooking spray.
  • Mix the ingredients, except for the baking soda, together in a casserole dish or large microwaveable bowl.
  • Microwave for 4 minutes on high. Stir and microwave for 3 minutes. Stir and microwave 1 minute.
  • Quickly stir in baking soda and pour onto tinfoil. This needs to be done quickly before the mixture begins to harden. Using a spatula, spread into a thin even layer.
  • Let the brittle harden for at least 30 minutes. Once cooled, break into pieces.


  • Every microwave is different, so you might find that you need to cook your sugar for less or more time. The candy needs to reach 300 degrees F on a candy thermometer before you add the baking soda and pour it out.
  • If you've cooked it for too long, the candy will begin to turn dark brown and smell burned.
  • If you don't cook it long enough, it won't be a golden color yet.
  • You can pour the candy onto a silicon mat to avoid the tin foil.
  • There's no need to put the candy into the refrigerator or cool it off. It will become brittle at room temperature.


Calories: 215kcal | Carbohydrates: 36g | Protein: 4g | Fat: 8g | Saturated Fat: 1g | Cholesterol: 1mg | Sodium: 203mg | Potassium: 113mg | Fiber: 1g | Sugar: 33g | Vitamin A: 12IU | Calcium: 17mg | Iron: 1mg