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Peanut Butter Fudge (Microwave)

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close up shot of a pile of Peanut Butter Fudge topped with m&m's on a plate
Rich and creamy, this peanut butter fudge is irresistible, and it takes only a handful of ingredients and a few minutes to make this classic treat!
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Table of Contents
  1. Peanut Butter Fudge Ingredients
  2. How To Make This Peanut Butter Fudge Recipe
  3. How To Serve
  4. Storage
  5. More Recipes You’ll Love
  6. JUMP TO RECIPE

This microwave peanut butter fudge is a yummy candy that’s so simple to make at home. This quick and easy recipe takes only 10 minutes to prep and needs just six ingredients to create a rich, creamy sweet treat that is totally irresistible.

close up shot of a pile of Peanut Butter Fudge topped with m&m's

Peanut Butter Fudge Ingredients

Peanut Butter Fudge raw ingredients that are labeled

You’ll need:

  • 1 cup of unsalted butter
  • 1½ cups of creamy peanut butter
  • 2 teaspoons of vanilla extract
  • 3¼ cups of powdered sugar
  • 1 tablespoon of water
  • Red and green M&M’s

PRO TIP:

You can choose the brand of peanut butter based on your personal preference, although we found the brand did affect the color of the fudge ever so slightly. See the substitutions section below for details.

SUBSTITUTIONS AND ADDITIONS

PEANUT BUTTER: Any commercial brand of smooth peanut butter will work for this recipe, although you may find that the brand you choose will affect the color of your fudge slightly. We tested four different brands (JIF, Peter Pan, Skippy, and Reese’s) and found that Peter Pan produced a darker color, JIF was the lightest, and Reese’s had a slight orange hue, but the fudge consistency was the same. The Peter Pan brand was also slightly sweeter, while the JIF was just a bit saltier.

VANILLA EXTRACT: If you don’t have this in the cupboard, you could use two teaspoons of maple syrup instead in this delicious fudge.

POWDERED SUGAR: This is also known as confectioner’s sugar or icing sugar. In a pinch, you could use six cups of granulated sugar instead in this simple recipe.

M&M’s: These are optional, but we love how they make this amazing fudge look pretty. You could use mini marshmallows, chocolate chips, peanut butter chips, or other small candies if you prefer. If you are making this another time of year, you can also use different colors of M&M’s too.

How To Make This Peanut Butter Fudge Recipe

STEP ONE: Cut out two pieces of parchment paper. One should be big enough to line an 8×8-inch square baking pan with enough overhang to lift the fudge out of the dish. The other should be just the right size to sit on top of the fudge.

STEP TWO: Add a tablespoon of water to the bottom of the 8×8-inch square pan and line the pan with the larger piece of parchment paper. Make sure to let the bottom parchment paper hang over the edges of the pan.

Peanut Butter Fudge process shot of baking dish lined with parchment paper

STEP THREE: In a medium-sized microwave-safe bowl, add the unsalted butter and the creamy peanut butter. Heat in the microwave for 60 seconds, and then stir the peanut butter mixture.

Peanut Butter Fudge process shot of butter and peanut butter being melted in a bowl

STEP FOUR: Add the vanilla extract and stir again.

Peanut Butter Fudge process shot of vanilla extract added to the fudge mixture

STEP FIVE: Slowly add the powdered sugar, one cup at a time, whilst stirring. The peanut butter mixture will become stiffer to stir. Continue to stir until completely combined with no lumps or white streaks.

OUR RECIPE DEVELOPER SAYS

Sifting the powdered sugar before mixing it in will help ensure that you have very smooth fudge.

Peanut Butter Fudge process shot of powdered sugar folded into the fudge mixture

STEP SIX: Pour the fudge mixture into the baking dish and spread it out evenly with a spatula.

Peanut Butter Fudge process shot of fudge mixture poured into a parchment lined baking dish

STEP SEVEN: Place the smaller piece of parchment paper on top of the fudge to help smooth the top surface of the fudge. Leave it in place and put the fudge in the refrigerator to chill for two hours.

Peanut Butter Fudge process shot of parchment paper placed on top of fudge mixture in a baking dish

STEP EIGHT: Remove the fudge from the refrigerator. Remove the top piece of parchment paper. Using a sharp kitchen knife, pre-score the size and number of the serving pieces of fudge, but do not cut the fudge until you remove it from the pan.

fudge being pressed in a baking dish

STEP NINE: Using the over-hang pieces of paper, lift out the fudge, and place it on a cutting board.

STEP TEN: Warm a large, sharp knife under hot water. Dry it and slice the fudge into small squares.

cutting fudge with a knife on cutting board

STEP ELEVEN: Once the pieces are cut, place 2-3 red and green M&M’s on the top of the fudge for decoration.

How To Serve

Every peanut butter lover will adore this creamy treat. This fudge is perfect for snacking or adding to a gift box along with our gingerbread fudge and Oreo fudge to give as a gift during the holiday season.

For more wonderful fudge recipes to make in the microwave, take a look at this tiger fudge, which has just three ingredients. This Reese’s peanut butter fudge is as decadent as they come.

Storage

IN THE FRIDGE: You can store this perfect treat for one week in the refrigerator or three days at room temperature. Always use an airtight container and separate the layers with wax paper, so the pieces of fudge don’t stick together.

IN THE FREEZER: You can freeze this creamy peanut butter fudge recipe for up to three months. Slice it and wrap each block in foil before freezing.

close up overhead shot of a bunch of Peanut Butter Fudge topped with m&m's


This microwave peanut butter fudge would make a great gift to give to someone over the holiday season, with the fun red and green M&M’s giving this fudge a lovely festive look. Creamy, sweet, with a rich peanut butter flavor, it’s sure to be a hit with the whole family.

FREQUENTLY ASKED QUESTIONS

Does the fudge need to be refrigerated?

This easy fudge recipe does need to be refrigerated, otherwise, it will get too soft sitting on the counter.

Can I use natural peanut butter for this recipe?

We do not recommend using natural peanut butter, as you won’t end up with the smooth texture you want in this easy peanut butter fudge recipe.

How do I slice chilled fudge easily?

To easily slice the fudge, dip a large sharp flat knife in boiling water, dry it completely and cut one long slice (the heat will help the blade to glide through).

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close up shot of a pile of Peanut Butter Fudge topped with m&m's on a plate

Peanut Butter Fudge (Microwave)

5 from 3 votes
Rich and creamy, this peanut butter fudge is irresistible, and it takes only a handful of ingredients and a few minutes to make this classic treat!
Prep Time 10 minutes
Total Time 2 hours 10 minutes
Servings 64

Ingredients
  

  • 1 cup unsalted butter
  • cups creamy peanut butter
  • 2 teaspoons vanilla extract
  • cups powdered sugar
  • 1 tablespoon water
  • red and green M&M's, optional garnish

Instructions
 

  • Cut out two pieces of parchment paper. One should be big enough to line an 8×8 baking dish with enough overhang to lift the fudge out of the dish. The other should be just the right size to sit on top of the fudge.
  • Add a tablespoon of water to the bottom of the baking dish and line the pan with the larger piece of parchment paper.
  • In a medium-sized microwave-safe bowl, add the unsalted butter and the creamy peanut butter. Heat in the microwave for 60 seconds and then stir. Add the vanilla extract and stir again.
  • Slowly add the powdered sugar, one cup at a time, whilst stirring. Continue to stir until completely combined with no lumps or white streaks.
  • Pour the fudge mixture into the baking dish and spread it out evenly with a spatula.
  • Place the smaller piece of parchment paper on top of the fudge to help smooth the top. Leave it in place and put the fudge in the refrigerator to chill for two hours.
  • Remove the fudge from the refrigerator. Remove the top piece of parchment paper. Using a sharp kitchen knife, pre-score the size and number of the serving pieces of fudge, but do not cut the fudge until you remove it from the pan. 
  • Using the over-hang pieces of paper, lift out the fudge, and place it on a cutting board.
  • Warm a large, sharp knife under hot water. Dry it and slice the fudge.
  • Once the pieces are cut, place 2 to 3 red and green M&M’s on the top of the fudge for decoration.

Video

Notes

  • Any commercial brand of peanut butter will work for this recipe, although you may find that the brand you choose will affect the color of your fudge slightly. We tested four different brands (JIF, Peter Pan, Skippy, and Reese’s) and found that Peter Pan produced a darker color, JIF was the lightest, and Reese’s had a slight orange hue, but the fudge consistency was the same. The Peter Pan brand was also slightly sweeter, while the JIF was just a bit saltier. Overall, any brand will give you delicious fudge!
  • Sifting the powdered sugar before mixing it in will help ensure that you have a very smooth fudge.
 

Nutrition

Calories: 85kcal | Carbohydrates: 7g | Protein: 2g | Fat: 6g | Saturated Fat: 2g | Cholesterol: 8mg | Sodium: 28mg | Potassium: 40mg | Fiber: 1g | Sugar: 7g | Vitamin A: 88IU | Calcium: 3mg | Iron: 1mg
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  1. Eileen Ball says

    5 stars
    I only had crunchy peanut butter so I used that. Yummy anyway! The fudge is very creamy but with some crunch added in!