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Microwave Peanut Butter Fudge

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This easy peanut butter fudge recipe is made with only 3 ingredients! Everything cooks in the microwave together and only takes 5 minutes to prepare. No candy thermometer needed for this quick and easy fudge!

plate of peanut butter fudge squares with child hand removing one

This peanut butter fudge is a perfectly creamy treat to serve for all your holiday get togethers, or any time of year!

Try your hand at other easy fudge recipes like maple walnut fudge and easy chocolate fudge.

overhead view of plate piled with peanut butter fudge squares

Fudge is a creamy, rich, and decadent treat but can often be tricky and time consuming to make. This recipe on the other hand only takes a few minutes to make and is perfect every time. 

Ok, so technically this recipe doesn’t qualify as real fudge because it contains no milk (beyond what is in the butter). But it looks like, feels like, and tastes like fudge. Its basically fudge. I guess you could call it cheater fudge? Faux-fudge? 

No matter how technical you want to be, we can all agree that this peanut butter fudge recipe is quick, easy, and dang delicious. It is perfect for holidays, parties, and a perfect way to satisfy anyone’s sweet tooth!

peanut butter fudge piled on table

How to make this quick fudge recipe

For the full set of recipe directions, make sure you scroll down to the recipe card below.

  1. Line an 8×8 pan with parchment paper. Make sure you have some overhang on the sides so you can easily pull the fudge out later.
  2. In a large microwave safe bowl, place the butter and peanut butter.
  3. Microwave on high for two minutes.
  4. Stir really well.
  5. Microwave on high for an additional two minutes.
  6. Carefully remove the bowl from the microwave. Add the powdered sugar to the mixture and stir to combine. The mixture will become a thick paste like batter.
  7. Spread the mixture into the prepared baking dish. Place a square of additional parchment on top of the fudge and use your hands to smooth/pat the surface to get it even.
  8. Place the dish in the refrigerator and let it cool and set for two hours.
  9. Remove the fudge from the dish using the parchment paper overhang. Cut into 1” squares.
mixing microwave peanut butter fudge in glass bowl

Recipe Tips

  • Avoid using natural peanut butter as the consistency can vary and affect the texture of the fudge.
  • Use a large sharp knife with a thin edge that has been heated under hot water and dried well to cut the fudge into nice clean lines.

Recipe Variations

You can change this fudge up with a few simple additions

  • Drizzle melted chocolate on top after it has set.
  • Sprinkle some flake salt on top before setting in the fridge.
  • Instead of creamy peanut butter, use chunky to give a bit of texture to your fudge.
  • Mix in some Reece’s Pieces or chopped peanut butter cups into the batter.

How do you store fudge?

The best way to store fudge is in an air-tight container in the refrigerator for 2-3 weeks. 

I remember my grandmother always storing it wrapped in plastic wrap, and then waxed paper, and then placing it in a glass container. You don’t have to go quite so gung-ho over it, but keeping it nice and air tight keep it from drying out.

cutting fudge into squares

How your kids can help you make this

Inviting kids into the kitchen with you is a great way to help them be more curious and interested in the foods you serve! Not only does it teach them great life skills, but it helps them be better eaters!

This microwave fudge recipe is great for practicing measuring different kinds of ingredients, and mixing.

  • Kids aged 1-3 can help you measure the ingredients and pat down the final fudge.
  • Kids aged 4-6 can do everything above plus mix in the powdered sugar.
  • Kids aged 7-10+ can help you do everything above, plus help you heat and mix the butter and sugar.

*Please note that these recommendations are generalized, and to please use your personal discretion with your child’s skill level. And always, always supervise! Read more about how to have your children help you in the kitchen.

microwave peanut butter fudge piled on grey plate

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Yield: 40 servings

Microwave Peanut Butter Fudge Recipe

overhead view of plate piled with peanut butter fudge squares

This easy peanut butter fudge recipe is made with only 3 ingredients! Everything cooks in the microwave together and only takes 5 minutes to prepare. No candy thermometer needed for this quick and easy fudge!

Prep Time 5 minutes
Cook Time 4 minutes
Additional Time 2 hours
Total Time 2 hours 9 minutes

Ingredients

  • 1 cup (2 sticks) unsalted butter
  • 1 cup creamy peanut butter
  • 1 lb powdered sugar

Instructions

  1. Line an 8x8 pan with parchment paper. Make sure you have some overhang on the sides so you can easily pull the fudge out later.
  2. In a large microwave safe bowl, place the butter and peanut butter.
  3. Microwave on high for two minutes.
  4. Carefully remove from the microwave and stir really well.
  5. Microwave on high for an additional two minutes.
  6. Carefully remove the bowl from the microwave and stir again.
  7. Add the powdered sugar to the mixture and stir to combine. The mixture will become a thick paste like batter.
  8. Spread the mixture into the prepared baking dish.
  9. Place a square of additional parchment on top of the fudge and use your hands to smooth/pat the surface to get it even.
  10. Place the dish in the refrigerator and let it cool and set for two hours.
    Remove the fudge from the dish using the parchment paper overhang. Cut into 1” squares.

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Nutrition Information:

Yield:

40

Serving Size:

1

Amount Per Serving: Calories: 85Total Fat: 3gSaturated Fat: 1gTrans Fat: 0gUnsaturated Fat: 2gCholesterol: 1mgSodium: 33mgCarbohydrates: 13gFiber: 0gSugar: 12gProtein: 1g

Nutrition information is an estimate and is provided for informational purposes only. For the most accurate information, please calculate using your specific brands and exact measurements.

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