Microwave Peanut Brittle

I posted this recipe originally in 2009.  I made it recently using a different microwave and totally burned it!  I made three batches of this over the weekend with some reduced times in the microwave and it turned out perfect. (Updated on 12/14/15)

Who knew you could make peanut brittle in the microwave?  So easy!  No candy thermometer or lots of stirring required!  It only takes about 6 minutes!  Easy peasy!

The original recipe called for 7.5 minutes of microwave cooking time total, which I found can be too long depending on your microwave.  I reduced the second cooking time from 3.5 minutes to 1 minute and it worked out great.  Just make sure you stick close to your microwave.  You don't want to burn it (or you'll have very DARK peanut brittle...yucky!).

Oh, and don't stick your HOT bowl into the sink or run water on it.  It just might crack like mine did a few years ago.  

Microwave Peanut Brittle
printable recipe
  • 1 c. granulated sugar
  • 1/2 c. light corn syrup
  • 1 c. salted peanuts
  • 1 teaspoon butter
  • 1 teaspoon vanilla extract
  • 1 teaspoon baking soda
  • a little extra butter for greasing pan
  1. Lightly butter a cookie sheet. 
  2. Combine sugar and corn syrup in a 2 quart glass bowl and microwave on high 3 1/2 minutes. 
  3. Stir in peanuts and microwave on high for 1 minute more.
  4. Stir in butter and vanilla and microwave for 1 minute. (WATCH the microwave closely. You DON'T want it to turn brown while cooking.) The sugar mixture will turn a little brown when you add the vanilla.
  5. Stir in baking soda until light and foamy. 
  6. Pour onto cookie sheet and tip the pan to spread thin. 
  7. Cool completely and break into pieces.
My friend, Megan gave me this recipe from her grandma.  I've changed the cooking times.