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4 Ingredient Microwave Peanut Butter Fudge

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Peanut butter fudge is one of my favorites. A super simple microwave peanut butter fudge recipe. This recipe takes minutes to make. This is a fantastic holiday fudge, or a year round dessert. 

A homemade peanut butter fudge that doesn’t use condensed milk. Give this delicious Christmas fudge recipe a try today. This old fashioned peanut butter fudge can leave the sprinkles off if you don’t want to make it a holiday dessert.

stacked peanut butter fudge on top of each other

Also, check out my wreath cake for another tasty Christmas dessert. For another fun holiday dessert try my ornament cookies.

Why Make This Peanut Butter Fudge

Microwave fudge – This easy peanut butter fudge is made in the microwave. No need for a pot on the stove. 

Simple ingredients -‘ A homemade fudge that practically cooks itself.This peanut bitter uses everyday ingredients. 

No condensed milk– If you want a fudge that is breads without condensed milk, I can help. 

Make ahead dessert – You can easily make this fudge 1-2 days in advance. I find that this fudge tastes incredible d run on day 2. 

Freezer Friendy –  Want to freeze your fudge? Go right ahead. You can freeze this easy pb five you can toss out if you want. 

ingredients for peanut butter fudge on wooden table

Ingredients You Will Need

Peanut butter – I prefer creamy but you are more than welcome to use crunchy leant butter. 

Powdered Sugar – Powdered sugar is a very fine white sugar that will mix up beautifully wnd without a struggle. 

Butter – I used unsalted but you are welcome to swap salted butter. 

Vanilla – Vanilla is going to help sweeten up the fudge without overpowering this dessert. 

Tools Needed

  • Spatula or whisk
  • Sifter is optional but you can use it to remove any lumps in sugar. 
  • 8×8 baking dish 
  • Parchment paper to prevent sticking and easy removal. 

Optional Mix-Ins and Toppings

  • Sprinkles – any season or color. I did Christmas sprinkles.
  • M&M’s – do classic color or Christmas colors, Valentines, Fall, Etc.
  • Reese’s Pieces
  • Chocolate Chips
  • Peanut Butter Chips
  • Peanuts
  • Etc.

How to Make 

collage on how to make fudge

Step One: Add peanut butter and butter in a bowl. Heat in the microwave for 20-30 seconds. Remove and stir, then reheat until all the butter is fully melted. 

Step Two:  Next, stir in the vanilla and mix well. Then you will move on.

Step Three: Next, pour in the powdered sugar and mix well till fully combined. 

collage on how to make Christmas peanut butter fudge collage

Step Four: Pour in a greased pan or a parchment lined pan. If you want, add sprinkles. Then and refrigerate until fully set up. 

Step Five: Once fudge is set up, slice and serve! 

Tips For Success

  • Use real butter not margarine. 
  • Take a knife and run under warm water. Once it warms, just a minute or two, slice your fudge. 
  • Sift powdered sugar for an extra creamy and smooth fudge. 
  • This peanut butter fudge makes an 8×8 pan. Double the recipe if you want for a 9×13 size. 
stacked fudge with white background

Storing Fudge

You can store any fudge you don’t plan to eat right away in an airtight container. 

Fudge can be stored in the refrigerator or at room temperature. It’s all what you prefer in terms of texture. 

Fudge will store up to 7 days, or you can freeze and fudge you don’t plan to eat right away. 

Freezing Fudge: Place the peanut butter fudge in an airtight container. Freeze 3-4 months. Thaw on counter or in the fridge overnight. 


stacked peanut butter fudge on top of each other

Peanut Butter Fudge

Yield: 8x8 pan
Prep Time: 10 minutes
Cook Time: 2 minutes
Additional Time: 1 hour
Total Time: 1 hour 12 minutes

Whip up a batch of this Peanut Butter Fudge! A delicious and velvety smooth peanut butter fudge recipe. This is made with 4 ingredients and is great for the holiday season. A great Christmas fudge to serve up, or make for a birthday party or event.


  • 2 sticks unsalted butter
  • 1/2 cup creamy peanut butter
  • 3 1/4 cup powder sugar
  • 1 teaspoon vanilla
  • Sprinkles, optional


  1. Dice up your butter into smaller slices, and place in a bowl with peanut butter.
  2. Place the bowl in the microwave and heat for 30 seconds, stir and repeat until the butter is fully melted.
  3. Now add in your vanilla extract, and give a good stir.
  4. Pour in the powder sugar, and mix until creamy.
  5. Pour into an 8x8 pan that is lined with parchment paper. Spread evenly.
  6. Add sprinkles if you would like.
  7. Cover tightly then place your peanut butter fudge in the fridge and let it set up for an hour or so. Then slice and enjoy this peanut butter fudge.


Butter - I recommend using real butter not margarine. If you use salted peanut butter you will run the risk of the fudge being a little extra salty.

Sprinkles - Sprinkles are optional. If you add them on lightly press them into the top of the peanut butter fudge to ensure they stay on.

Mix Ins - Chocolate chips, peanut butter chips, peanuts, etc.

Double the Recipe - Feel free to double the recipe if you want. Just use a 9x13 pan for the recipe to double.

Servings - This fudge is very rich. I recommend cutting into smaller pieces, as a little piece goes a long way.

Sifting Powder Sugar - If you sift the powder sugar it will help to give you an even creamier texture to the fudge. It is up to you if you choose to do it.

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Nutrition Information:
Yield: 16 Serving Size: 1
Amount Per Serving: Calories: 308Total Fat: 16gSaturated Fat: 8gTrans Fat: 0gUnsaturated Fat: 6gCholesterol: 30mgSodium: 40mgCarbohydrates: 43gFiber: 0gSugar: 41gProtein: 2g

This information is automatically calculated by third-party software, including but not limited to the Create or Bake Me Some Sugar. For accurate nutrition, I suggest running the ingredients in your own system to get a more accurate reading. Nutritional information is approximate and automatically calculated, and should only be viewed as an indication.

peanut butter fudge
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