10 Minute Microwave Peanut Brittle – A Microwave Peanut Brittle with Karo Syrup Recipe

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10 Minute Microwave Peanut Brittle is the best because it’s quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda. Add this to your Christmas treats for an old fashioned tradition.

Every Christmas, our lovely neighbor Susan brought a tasty array of treats from her kitchen. To this day, these treats are on my top five all time favorite Christmas Candy list.  It wasn’t really Christmas until Susan dropped off her goodies.  Check out the other two recipes below.

Cinnamon Glazed Nuts

Ever wanted to make those sweet, crunchy nuts that are a staple at mall kiosks across the country? Look no farther than our Cinnamon Glazed Nuts (pecans)! And guess what? They are simple to make, and only takes five ingredients.

Old Fashioned Peanut Butter Balls 

Old Fashioned Peanut Butter Balls is an easy recipe for a plain peanut butter ball.  These classic Christmas candies are also called Buckeye Balls because they resemble an Ohio Buckeye with a peanut butter center covered in chocolate.

Microwave Peanut Brittle with Karo Syrup Recipe

This easy peanut brittle takes less than 10 minutes from start to finish. The trick to this shortcut recipe is using your microwave. Susan says to use your microwave on high for this recipe.

Another suggestion from Susan is to use a 1 1/2 quart casserole dish to cook the brittle in the microwave. I have also used a large Pyrex bowl myself. Just be sure that your dish is microwave safe.

There are many different brittle recipes out there. This old fashioned peanut brittle uses both baking soda (not to be confused with baking powder) and white corn syrup (also known as Karo).

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Ingredient List for Microwave Peanut Brittle with Karo Syrup

Granulated Sugar

White Corn Syrup (Karo Syrup)

Peanuts, roasted and salted

Butter

Vanilla Extract

Baking Soda

How to Make Peanut Brittle in the Microwave

For the full ingredient amounts and recipe steps for easy microwave peanut brittle, scroll to the recipe card at the bottom of this post.

  1. In a 1 1/2 quart casserole dish or a large microwave-safe bowl, mix together granulated sugar and white corn syrup (Karo).
  2. Microwave on high heat for 4 minutes.
  3. Remove from microwave, and stir in peanuts.
  4. Microwave for 3 more minutes. Check it at the 2 minute mark to make sure it isn’t burning (if so, do not cook the additional minute).
  5. Stir in vanilla extract and butter until butter is fully melted.
  6. Cook for 1 additional minute.
  7. Stir in baking soda until light and foamy.
  8. Pour onto a lightly greased sheet pan or pizza pan, spreading it lightly and quickly.
  9. Let harden and cool.
  10. Break into pieces.

Notes About Microwave Peanut Brittle with Baking Soda

  • Use roasted, salted peanuts. If you prefer small bits of peanuts, chop them up before adding to the brittle.
  • The key to this recipe is to work quickly because the microwave peanut brittle hardens really fast.
  • Be sure to have a towel or pot holder handy for moving the bowl around. It is hot hot hot, and you don’t want to get burnt.
  • Boiling sugar is super hot as well. Resist the urge to touch the peanut brittle with your hands until it has hardened and cooled. Keep little hands away too.
  • Spray all surfaces with nonstick cooking spray to help whttps://www.pinterest.com/pin/712342866068801490ith clean up.  This includes the microwave-safe bowl, spatula, liquid measuring cup (for Karo), and the sheet pan.
  • Check out our Amazon store for our favorite pantry essentials and kitchen items.

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Homemade Christmas Gift Ideas

What are some DYI Christmas gifts on a budget?

Using your kitchen is a great way to whip together some amazing Christmas gifts straight from the heart.  To take a homemade treat to the next level, package the goodies in something special like a new mug or wrap it up in a new kitchen towel, or consider attaching a new serving spoon.

Here’s 15 DIY Christmas gifts straight from our kitchen to yours. We even put together a post all about our favorite homemade holiday gifts!

  1. Homemade Hot Cocoa Recipe 
  2. Friendship Tea 
  3. Homemade Martini Olives
  4. Old Fashioned Hot Fudge Sauce
  5. Strawberry Freezer Jam
  6. White Chocolate Candy Mix 
  7. Grandma’s Caramel Corn
  8. Candied Peanuts 
  9. Red Hot Cinnamon Apples
  10. Cinnamon Glazed Nuts
  11. Hot Buttered Rum Mix
  12. Old Fashioned Peanut Butter Balls 
  13. Crock Pot Chili Nuts
  14. Pulled Pork Spice Rub 
  15. Mom’s Poppy Seed Bread

10 Minute Microwave Peanut Brittle is the best because it's quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda.
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5 from 1 vote

10 Minute Microwave Peanut Brittle - A Microwave Peanut Brittle with Karo Syrup Recipe

10 Minute Microwave Peanut Brittle is the best because it's quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda. Add this to your Christmas treats for an old fashioned tradition.
Prep Time2 mins
Cook Time8 mins
Total Time10 mins
Course: Dessert, Snack
Cuisine: American
Keyword: 10 minute microwave peanut brittle, microwave peanut brittle, microwave peanut brittle with baking soda, microwave peanut brittle with karo syrup, old fashioned peanut brittle
Servings: 16 pieces
Author: Barbara

Ingredients

  • 1 cup granulated sugar
  • 1/2 cup white corn syrup (Karo)
  • 1 cup peanuts, roasted and salted
  • 1 teaspoon vanilla extract
  • 1 teaspoon butter
  • 1 teaspoon baking soda

Instructions

  • In a microwave-safe bowl, mix sugar and corn syrup. (A 1 1/2 quart casserole or large Pyrex bowl works great).
  • Microwave on high for 4 minutes.
    10 Minute Microwave Peanut Brittle is the best because it's quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda.
  • Remove from microwave, and stir in peanuts.
    10 Minute Microwave Peanut Brittle is the best because it's quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda.
  • Microwave for 3 minutes. Check after 2 minute mark to make sure it isn't burning. If so, omit the 3rd minute and continue.
    10 Minute Microwave Peanut Brittle is the best because it's quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda.
  • Stir in butter and vanilla extract until butter is melted.
  • Return to microwave for 1 additional minute.
  • Stir in baking soda until light and foamy.
    10 Minute Microwave Peanut Brittle is the best because it's quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda.
  • Pour onto a sheet pan or pizza pan that has been sprayed with nonstick cooking spray.
    10 Minute Microwave Peanut Brittle is the best because it's quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda.
  • Let cool. Once cool and hardened, break into small pieces.
    10 Minute Microwave Peanut Brittle is the best because it's quick, easy, crunchy and delicious.  This Peanut Brittle recipe has Karo syrup and baking soda.

Notes

  • Use roasted, salted peanuts.  If you prefer small bits of peanuts, chop them up before adding to the brittle.
  • The key to this recipe is to work quickly because the microwave peanut brittle hardens.
  • Be sure to have a towel or pot holder handy for moving the bowl around. It is hot hot hot, and you don't want to get burnt.
  • Boiling sugar is super hot as well. Resist the urge to touch the peanut brittle with your hands until it has hardened and cooled. Keep little hands away too.
  • Spray all surfaces with nonstick cooking spray to help with clean up.  This includes the microwave-safe bowl, spatula, liquid measuring cup (for Karo), and the sheet pan.
  • Love peanuts? Try these candied peanuts!

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One Comment

  1. I will be making this this afternoon. Have always made it on the stove and it never really came out. I make the marshmello fudge in the microwave so this should be a snap. Thanks so much for posting this.

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