Microwave Peanut Brittle
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Perfect for bake sales, gift swaps, or snacking by yourself. Microwave peanut brittle can be made without a thermometer and it sets up in minutes! Try this easy recipe for a classic holiday treat.
Why You’ll Love This Recipe for Microwave Peanut Brittle
Ingredient Notes
- Peanuts — Use plain dry-roasted or shelled peanuts so the candy isn’t too salty. A honey-roasted variety may also be tasty, just keep a close eye so they don’t burn.
- Baking soda — While it may seem like an odd ingredient, baking soda is responsible for all the little air bubbles that give this treat its crispy texture!
- Sugar — Regular granulated sugar is all you need for this recipe.
- Corn syrup — This helps the brittle set up correctly and give it that classic snap. You may get similar results with honey, but the flavor and texture will be a bit different.
- Butter — A little goes a long way for an incredibly buttery flavor. It also keeps the candy a bit tender, making it easier to chew.
How to Make Peanut Brittle
Making peanut brittle in the microwave is much easier than on the stovetop, but be extra careful removing the hot sugar from the microwave!
STEP 1 | Heat the sugar
Combine granulated sugar, light corn starch, and salt in a glass bowl and microwave on HIGH for five minutes. This mixture expands quite a bit, especially at the end, so be sure your bowl has plenty of room.
STEP 2 | Add the peanuts
Stir in the nuts, then heat for an additional two minutes. The mixture should turn a lovely golden brown towards the end.
STEP 3 | Stir in remaining ingredients
Melt in the butter along with vanilla and baking soda, then pour the mixture out onto a greased jelly roll pan. Tilt the pan from side to side so it spreads out evenly — work quickly because it starts to cool right away!
STEP 4 | Cool and crack
Let the microwave peanut brittle set up completely, then break it into smaller pieces. You can use your hands or gently tap it with a kitchen mallet, whichever is easiest.
Tips from the Home Chef’s Kitchen
Variations and Substitutions
Not a fan of peanuts? Swap in your favorite nuts instead — almonds, pecans, hazelnuts, or cashew pieces would all be delicious!
Storage Tips
Store peanut brittle in an airtight container, such as a holiday tin, at room temperature for up to 2 weeks.
Frequently asked questions
When stored in an airtight container, it should keep at room temperature for up to two months! Add a piece of wax paper or parchment between layers to prevent them from sticking together.
I would recommend cooking one batch at a time in the microwave, but you could make several in one go and let them cool all at once.
Otherwise, you should be able to double or triple the ingredient amounts with a stovetop version. Just be sure to use a large enough pot and monitor the temperature carefully.
Instead of heating the sugar and corn syrup in the microwave, you will need to boil it on the stove. Combine both ingredients in a medium saucepan with the salt, then place over medium heat and stir constantly until the mixture begins to boil.
Cook for about 5 minutes without stirring, or until a candy thermometer reaches 310 degrees. Add the peanuts and cook for a few more minutes — the temperature will drop, so bring it back up to 280 degrees.
Remove from heat and stir in the remaining ingredients. Then pour onto the sheet pan and cool as directed.
Looking for More Homemade Food Gifts?
If you’re looking for easy food gifts to package up for teachers or neighbors, try these 4-ingredient Chocolate Peanut Butter Balls, my Chocolate Chip Cookie Mix, or Cranberry Pistachio Biscotti.
Serving suggestions
You can make this treat extra decadent with a variety of toppings. Sprinkle on extra nuts or candy pieces before it cools, or drizzle caramel over the pieces and let them set a bit longer.
Beyond the Recipe
One of my Dad’s all-time favorite Christmas candies was old fashioned peanut brittle. For several years, I would wrap some up in a tin for my Dad and my Father-In-Law as a gift on Christmas Eve.
The funny thing is that both of them would open the gift, take a sneak peek inside, and then quietly hide it away so as to keep it all to themselves!
Over the years, my nieces took over making Papaw Cecil’s brittle. This is the recipe they liked best because it’s so easy and turns out so delicious.
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Microwave Peanut Brittle
Ingredients
- 2 ½ tablespoons unsalted butter divided
- 1 cup granulated sugar
- ½ cup light corn syrup
- ⅛ teaspoon salt
- 1 cup dry-roasted or shelled raw peanuts
- 1 teaspoon baking soda
- 2 teaspoons vanilla
Instructions
- Grease a 15 x 10 inch jelly roll pan with with 1 /2 tablespoon of the butter.
- Combine the sugar, corn syrup, and salt in a large glass bowl.
- Microwave on HIGH for 5 minutes. Add the peanuts and microwave for 2 more minutes with 1,000-watt microwave. Microwave 4 more minutes if using a 700-watt microwave.
- Carefully stir in the butter, baking soda, and vanilla. Working quickly, pour the brittle into the prepared pan and shake gently to spread into a thin layer.
- Cool until firm, then break into pieces.
Notes
To make this recipe on the stove:
- Grease a 15 x 10 inch jelly roll pan with 1 /2 tablespoon of the butter.
- Cook the sugar, corn syrup, and salt in a medium-size heavy saucepan over medium heat, stirring constantly, until mixture starts to boil.
- Boil — without stirring — for 5 minutes or until a candy thermometer reaches 310 degrees.
- Add the peanuts and cook 2 – 3 more minutes, or until the mixture reaches 280 degrees. The mixture should be golden brown.
- Remove from heat and carefully stir in the butter, baking soda, and vanilla.
- Working quickly, pour the brittle into the prepared pan and shake to spread into a thin layer. Allow to stand 5 minutes or until hardened. Break into pieces.
Nutrition
Life Love and Good Food does not claim to be a registered dietician or nutritionist. Nutritional information shared on this site is only an estimate. We recommend running the ingredients through an online nutritional calculator if you need to verify any information.
Sheila:
I made a similar version in the microwave and it didn’t quite work out. Then, I found yours and tried it. It’s superior. And, I like the two tablespoons of butter. I think it makes it a tad creamier. Thanks for sharing.
So glad it woked out for you, Alicia! Merry Christmas to you and your family!