Microwave Peanut Brittle


The countdown continues, only 4 days until Christmas! If you are a last minute planner this recipe will come in so handy for you. You wouldn’t believe how easy it is to make this Microwave Peanut Brittle (just check out the step-by-step photos below the recipe and you’ll see)! Not only that but it has the perfect texture and it tastes delicious! No one will even know you made it in the microwave. It will make a perfect last minute gift for that friend or neighbor on you list, or for yourself of course :)!

Microwave Peanut Brittle | Cooking Classy

If you like your peanut brittle to have more of the meltaway effect, I like to spread as little as possible so it’s light and crisp. If you like it more of the traditional way just spread it out thin. Either way you are going to love this!

Merry Christmas week everyone!

Microwave Peanut Brittle | Cooking Classy


Microwave Peanut Brittle

4.82 from 11 votes
Prep Time: 5 minutes
Cook Time: 9 minutes


  • 1 cup granulated sugar
  • 1/2 cup light corn syrup
  • 1 cup unsalted peanuts
  • 1/4 tsp salt
  • 1 Tbsp butter
  • 1 tsp vanilla extract
  • 1 tsp baking soda


  1. Generously butter a cookie sheet. In a 2-quart (8 cup) glass mixing bowl, using a spoon, stir together granulated sugar and corn syrup. Microwave mixture on HIGH power 4 minutes.
  2. Stir in peanuts and salt, microwave on HIGH power 3 1/2 minutes.
  3. Mix in butter and vanilla extract, stirring until butter is melted. Microwave on HIGH power 1 1/2 minutes.
  4. Stir in baking soda (mixture will become fluffy and foamy). Pour and and lightly spread out onto prepared baking sheet (note that the less you spread the lighter the brittle will be, or more air bubbles it will have, so if you prefer it like so then do as little spreading as possible. If you prefer it flatter then spread it out thin).
  5. Allow to cool at room temperature then break into pieces once set.
  6. Recipe source: adapted from allrecipes.com

Recipe Notes

Cook times may vary slightly depending on microwave wattage. Watch for a golden brown color near the end.

Microwave Peanut Brittle | Cooking ClassyMicrowave Peanut Brittle | Cooking ClassyMicrowave Peanut Brittle | Cooking ClassyMicrowave Peanut Brittle | Cooking ClassyMicrowave Peanut Brittle | Cooking ClassyMicrowave Peanut Brittle | Cooking Classy


  • Laura Dembowski: I love easy microwave recipes like this. Such a great holiday gift or treat. December 20, 2014 at 6:44pm Reply

  • ATasteOfMadness: I love peanut brittle, but I had no idea you could make it in the microwave. I must try this! December 20, 2014 at 6:59pm Reply

  • Averie @ Averie Cooks: This looks soooo good! I love peanut brittle and made a microwave version a year or two ago. Your pics blow mine away and I want to have this now!! :) December 20, 2014 at 8:39pm Reply

  • Jessica @ A Kitchen Addiction: Peanut butter brittle is a must at Christmas! Love how easy yours is! December 22, 2014 at 11:47am Reply

  • Stephanie @ Velez Delights: Wow, looks delicious! Happy Holidays & Merry *early* Christmas! December 22, 2014 at 2:02pm Reply

  • Laura (Tutti Dolci): Homemade peanut brittle is the best, I just love this! December 24, 2014 at 12:51am Reply

  • Shelby @ Go Eat and Repeat: This looks so easy! My moms peanut brittle recipe takes forever to make and is super temperamental. This seems much more use friendly haha January 5, 2015 at 6:10pm Reply

  • Elena: If you substitute pecans for peanuts, your candy tastes like pecan pie. Soooo good. October 6, 2015 at 8:17pm Reply

  • Debra: This is my late Aunt Mabel’s recipe that I use every Christmas. Everyone loves it. But there are many variables to its success. I like to have all my ingredients room temperature. What size bowl you use makes the time you microwave different. I purchased a Pyrex 2 quart clear glass pitcher with a handle. It works the best as you have something to hold on to when you remove it from the microwave as it is VERY HOT!!! November 27, 2015 at 8:24am Reply

    • Judy Meyer: Good idea about using the Pyrex pitcher! Handling and pouring out of a bowl was difficult! December 19, 2016 at 4:01pm Reply

  • Julia: This was yummy! My hubby and I loved it. Will never buy another expensive bag again. Thank you for the recipe! January 20, 2017 at 11:37pm Reply

    • Jaclyn: I’m so glad you both enjoyed it. Thanks Julia! January 25, 2017 at 10:31am Reply

  • Grandma: delicious brittle….anyone know the shelf life of this brittle? How soon can you make b4 Christmas for gift giving? Thanks so much October 20, 2017 at 5:18am Reply

  • Bethany: Just tried a half batch in my 1000W microwave. It was nearly burned by the end of the first cycle November 28, 2017 at 8:02pm Reply

    • Jaclyn: That could likely be due to making a half batch as it would heat faster and therefor wouldn’t need as much time. Sorry it didn’t turn out! November 28, 2017 at 9:42pm Reply

      • Kathy Harmon: I’ve tried 3 times in microwave with 1000 wts burnt every time.Kathy December 11, 2017 at 7:24pm Reply

  • Denise: Easy and delicious! November 29, 2017 at 9:01am Reply

  • Cindy:: This is great peanut brittle, and so fast and easy, I do add about a teaspoon of water with the surgar and syrup, it just makes it easier to pour when done. I also use a glass measuring bowl with a handle so I have something to hang onto while pouring. Love it!! December 5, 2017 at 5:59pm Reply

    • Jaclyn: Thanks for your feedback Cindy! December 7, 2017 at 5:21pm Reply

  • Lydia Butler: Easy peasey, but it burned a little! I followed recipe to a tee, I think cook-
    ing time needs to be lessened on the last 1 1/2 minutes! December 10, 2017 at 3:45pm Reply

  • Angela Hills: I can’t get cornstarch here in the uk what can I use to substitute it please December 10, 2017 at 5:51pm Reply

    • Meliss: Not cornstarch. Baking soda. December 20, 2017 at 8:55pm Reply

  • barbara clapp: This was the worst p.b. I have ever made. the cooking time of 3 1/2 minutes when adding the peanuts was way too long for my micro. my usual time is 2 minutes and adding the butter 1 minute. your recipe was totally very dark brown smelled burned and was not edible as it tasted very burned. December 11, 2017 at 4:07pm Reply

    • Charissa: Thanks! You are right about cooking time. Today’s microwaves must be more powerful. I will try with time you suggested. I’ve made this recipe for over 20 years and now it gets too dark. December 25, 2017 at 8:21am Reply

  • Jr Fredrickson: Recipe was very helpful! I needed to reduce the corn syrup to 1/4c and increase the peanuts to 1-1/2c but that’s probably due to ambient temp, humidity and my little microwave. I’m so glad to have found a recipe to replace the one I lost 10yrs ago. Thank you so much! December 12, 2017 at 8:18pm Reply

    • Jaclyn: You’re welcome! Thanks for the positive feedback Jr. December 13, 2017 at 1:21pm Reply

  • Vanessa Grimes: I made this recipe and has never failed to turn out right. Been making microwave peanut brittle for many years! I am all about easy recipes. Very easy to make. Thank you for sharing your recipes! December 15, 2017 at 3:43pm Reply

    • Jaclyn: Thanks for the positive feedback Vanessa! December 18, 2017 at 3:27pm Reply

  • Emily: Hi, how long would you say it lasts for once it’s made? Thanks. December 17, 2017 at 5:47am Reply

  • Lori: I’ve never made peanut brittle in my life and I thought I’d try this because my husband loves peanut brittle. I have made a lot of dishes from pins on Pinterest that have been less than mediocre. This is by the far the best recipe I’ve found on here and oh so easy and delicious! Thank you and have a Merry Christmas! December 24, 2017 at 7:44pm Reply

    • Jaclyn: Thanks and Merry belated Christmas! January 2, 2018 at 3:55pm Reply

  • Libbie Suntioinen: Thanks for this recipe. I have never made microwave brittle before so was suspicious but it made up perfectly for me! I think my old fashioned recipe is going to be retired since it is so temperamental and this was so easy :-) December 29, 2017 at 10:54am Reply

  • Mike: I have used a similar recipe for some time, only using 2 tbsp peanut butter in place of the butter. It pulls the oils needed from there and gives a great flavor as a whole. January 1, 2018 at 11:02am Reply

  • TRUDY MANN: I have only made peanut brittle one other time, it took almost 30 minutes of cook time, it was like watching paint dry!! I wasn’t sure about making it in the microwave but decided I’d give it a try. This was so easy and delicious and was the perfect texture with just the right amount of peanuts to candy ratio. This will definitely be my “go to” recipe every time. Thank you for sharing this delicious recipe! January 8, 2018 at 8:58am Reply

    • Jaclyn: Thanks Trudy! January 8, 2018 at 12:14pm Reply

  • ANN HALE: It tasted overcooked, perhaps because my microwave is 1100 watts.

    I will try it again, lowering cooking times by a minute or so during each step. If someone else has adjusted their cooking time, I would appreciate any hints.

    I used a silpat mat instead of butter/pam on the cookie sheet and it worked perfectly. January 16, 2018 at 10:05am Reply

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