Microwave Peanut Brittle

Microwave Peanut Brittle

As I was preparing to do my holiday baking and cooking, King Arthur Flour posted a recipe for Microwave Peanut Brittle. The recipe sounded perfect. I love making candy to gift for the holidays because it ships well and stays good for a long time. However, although candy-making can deceptively simple – you boil sugar water to a given temperature, then add things – it can also be time-consuming and prone to failure. I did not want time-consuming when I would make 3 batches of brittle to include with my other baking, but this recipe took no more than 20 minutes to make. Perfect.

I’ve made peanut brittle a few times, since it happens to be a favorite of my dad’s. This recipe is my favorite one yet.

microwave peanut brittle

The peanut brittle was really, really good. It was not hard to bite into like most brittle, and was a little sandy when you chewed it. The brittle was very sweet, of course, but it was also richer than most brittles. The sweetness was balanced well by the amount of peanuts in it; Alex and I both thought it was more peanutty than other peanut brittles we’ve had. I bought unsalted peanuts and sprinkled salt on top, which also helped balance the candy.

This was a great recipe. It was quick and easy to make, and is so much better than any other peanut brittle recipe I’ve tried. I highly recommend you give it a try sometime.

microwave peanut brittle

Microwave Peanut Brittle
Prep Time
5 mins
Cook Time
10 mins
Total Time
15 mins

This delicious and easy microwave peanut brittle takes just 6 ingredients and less than 20 minutes! So much better than store-bought!

Course: Snack
Cuisine: American
Keyword: microwave peanut brittle
Author: Leona Konkel
  • 1 cup sugar (200 grams)
  • 1/2 cup corn syrup (156 grams)
  • 1 1/2 cup roasted peanuts (207 grams) (unsalted or salted)
  • 1 tablespoon butter (14 grams)
  • 1 teaspoon baking soda
  • 1 teaspoon vanilla extract
  • salt for sprinkling (if using unsalted peanuts)
  1. Stir to combine sugar and corn syrup in a large, tall microwave-safe bowl. A glass bowl works best. I used an 8-cup glass measuring cup. The mixture should fill no more than 1/3 of the bowl.

  2. Microwave on high for 5 minutes.
  3. While the mixture microwaves, spray a baking sheet with cooking spray or line with parchment. Spray a wooden spoon or spatula for stirring and spreading. Also, make sure the rest of your ingredients are in place.
  4. Add peanuts and butter to the sugar mixture, then stir to combine well.
  5. Microwave bowl again on high for 2-4 minutes, until the mixture reaches a caramel color - a golden brown. This time will vary depending on the power of your microwave. Mine was ready at 3 minutes. Err on the side of too light than too dark.

  6. Add baking soda and vanilla and stir vigorously. The mixture will foam up.
  7. Quickly pour the candy onto the greased sheet. Spread the candy out as evenly as possible. Shake the pan gently to spread it out, so that you don't smooth out any bubbles. Sprinkle with salt if you used unsalted peanuts.

  8. Let cool completely (30-60 minutes) before breaking into pieces. Store in an air-tight container.

Recipe Notes

Candy cooks quickly, so prepare all your ingredients before you start. The peanut brittle cooks quickly, and hardens quickly once cooked. 

Grease your pan and wooden spoon well. 

If you're having trouble seeing your candy as it microwaves, try turning off your kitchen light so you can see into the microwave more easily.

Adapted from King Arthur Flour




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