Microwave Peanut Butter Fudge


Microwave peanut butter fudge will bring a smile to any peanut butter lover. This easy dessert comes together in just 5 minutes, making it a breeze to whip up for potlucks, gifts, or a sweet treat for yourself. With only three ingredients, you likely have everything on hand to make this right now!

How Long Does it Take to Make Microwave Peanut Butter Fudge?

You can put together this fudge in just 5 minutes! First, combine the butter and peanut butter and microwave for 2 minutes, stirring halfway through. Next stir in the powdered sugar until smooth. Then simply spread into a parchment paper lined pan, refrigerate for 2 hours, cut, and enjoy! Before you know it, you’ll be enjoying these sweet peanut butter squares.

What Type of Peanut Butter Works Best?

When making this fudge, it’s best to use creamy peanut butter instead of natural style. Natural peanut butter contains less fat and more oil, which can affect the set up and texture of the fudge. For best results, use a commercial creamy peanut butter for ultimate fudgy satisfaction.

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Can You Make Ahead and Store This Fudge?

Absolutely! This fudge stores very well, making it a great make-ahead dessert option. You can even prepare it, cut it into pieces, and freeze in an airtight container for up to three months. Thaw at room temperature or briefly microwave individual pieces to restore that just-made soft, fudgy texture before enjoying. It’s also perfect to make as edible gifts!

What Can I Add to Customize This Recipe?

While this 3-ingredient fudge is perfect as-is, you can also stir in 1⁄2 cup to 1 cup mix-ins like chopped nuts, chocolate chips, crushed peppermint, butterscotch chips or pretzel pieces once combined for custom flavors. Get creative with your own favorite add-ins!

Satisfy those sweet cravings in minutes with this easy microwave peanut butter fudge. Keep some stashed in the fridge or freezer for emergency chocolate emergencies!


  • 8 oz unsalted butter
  • 1 cup creamy peanut butter (avoid natural peanut butter for best texture)
  • 1 lb powdered sugar


  1. Prepare an 8 x 8 inch pan with parchment paper, leaving edges hanging for easy removal.
  2. In a microwave-safe bowl, mix butter and peanut butter. Microwave for 1 minute, stir, then microwave for another minute. Stir until smooth.
  3. Blend in powdered sugar to form a thick paste.
  4. Spread the mixture in the prepared pan. Cover with another parchment paper and press evenly.
  5. Remove top parchment, smooth the surface, and refrigerate for 2 hours.
  6. Cut into 1-inch squares. Store remaining fudge in the refrigerator.


  • This recipe is a slight variation of Alton Brown’s version.
  • Nutrition estimates are based on online calculators. Consult a professional for precise dietary information.


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