Skip to Content

Four Ingredient Microwave Peanut Butter Fudge

Four-ingredient microwave peanut butter fudge is an easy recipe that turns out creamy and decadent. It is perfect for any time of year, especially around the holidays.

The basic recipe is so delicious that everyone who tries it can’t believe it was made in the microwave.

Trust me, your peanut butter lover will love this easy dessert.

Easy Peanut Butter Fudge Recipe

Sliced peanut butter fudge in a dish

Microwave fudge is one of the easiest recipes out there. It’s perfect for your sweet tooth and only requires a few ingredients.

It’s a very rich fudge recipe that everyone will love.

For this recipe, you won’t need a candy thermometer (yay!), marshmallow creme, or sweetened condensed milk. You only need four ingredients.

Easy 4-Ingredient No Bake Peanut Butter Fudge stacked in three pieces.

You also don’t have to heat up the stove top or use a hand mixer. Win-win!

And, if you don’t want to add vanilla extract, it’s only three ingredients for the creamy and delicious recipe.

Pieces of peanut butter fudge in a bowl

What Ingredients Do I Need For The Fudge Mixture?

The easy fudge recipe is made with basic ingredients and turns out to be a delicious creamy fudge every time.

  • Butter
  • Creamy Peanut Butter
  • Vanilla extract
  • Powdered sugar, aka confectioners sugar

Full printable recipe with measurements and instructions listed at the bottom of the post in the recipe card.

How Do I Make The Four Ingredient Peanut Butter Fudge?

  1. Cut the butter into cubes and add to a large microwave-safe bowl.
  2. Add the peanut butter to the bowl.
  3. Microwave for two minutes and stir (be careful, it’s hot!).
  4. Microwave for two more minutes and remove (set it on something that can handle the heat and be careful because it will be super hot at this point).
  5. Add the powdered sugar and mix with a spatula until the powdered sugar is completely dissolved.
  6. Add to a square pan lined with parchment paper and refrigerate for one to two hours.
Peanut butter fudge sliced and on the counter.

Step-By-Step Instructions for Making The Creamy Peanut Butter Fudge Recipe

Cubed butter in a glass bowl.

Start by cutting up the butter into cubes and adding it to a large bowl that is microwave-safe.

Cutting the butter into cubes isn’t absolutely necessary. It just helps melt the butter a little faster and more evenly.

I used a large glass bowl that is heat-safe.

Peanut butter and butter in a glass bowl.

Next, add the peanut butter to the bowl and microwave for about two minutes.

Be sure to take caution because the bowl and ingredients will be very hot.

Melted butter and peanut butter in a glass bowl.

Stir the ingredients and stick the bowl back in the microwave for another two minutes.

The ingredients will be boiling, so use caution and don’t set the bowl on something that can get ruined.

Pouring vanilla into a bowl with peanut butter and butter

Once you remove the bowl from the microwave, pour the vanilla extract in and give it all a good stir.

Adding powdered sugar to a bowl.

Finally, add the powdered sugar to the bowl and stir until you’ve mixed it all in.

The fudge is going to be very thick, and when you mix it in, it’s almost like you’re folding it in.

I used a spatula to stir everything, and that seemed to work best.

Peanut butter fudge in a square dish.

Press the peanut butter mixture into the 8-inch by 8-inch pan lined with parchment paper.

Refrigerate the peanut butter fudge for one to two hours.

I didn’t grease the pan because there is so much butter in the recipe that it is not going to stick.

The parchment paper makes it easy to lift the homemade peanut butter fudge out and cut it on a cutting board. I cut out a rectangular piece and have a little excess parchment paper on the sides to lift the fudge out easily.

Easy 4-Ingredient No Bake Peanut Butter Fudge stacked in three pieces.

The recipe makes such a smooth peanut butter fudge dessert.

The recipe is perfect for Christmas desserts, holiday parties, Thanksgiving, or any time in between.

Easy 4-Ingredient No Bake Peanut Butter Fudge stacked in three pieces.

How Do I Store The Homemade Fudge Recipe?

You can store the fudge at room temperature in an airtight container. You can also keep it in the refrigerator, as well.

Small squares of fudge in a dish.

Slice the fudge with a sharp knife, and you’ve got the perfect treat.

You can cut the fudge into small squares and get about 25 pieces for a holiday party, or cut them a little larger.

You can also cut the pieces of fudge and place them in gift bags or munch on individual pieces. It’s the easiest recipe and so delicious!

The recipe makes delicious, rich fudge with peanut butter flavor without all the cooking.

More Easy Fudge Recipes For The Holiday Season

And, if you’d like to find out all the goods on making fudge, check out “Making Fudge Recipes: Your Questions Answered.”

Four Ingredient Microwave Peanut Butter Fudge

If homemade peanut butter fudge is your favorite type of fudge, you’ve got to make this delicious treat with a few simple ingredients.

Serve sweet treats like this at your next party – the church potluck, birthdays, holiday parties, or just because you need something decadent and delicious without having to bake it!

And the best part of this recipe? It’s super easy, and it’s the perfect dessert!

Microwave peanut butter fudge recipe

Four Ingredient Microwave Peanut Butter Fudge

Yield: 25 pieces
Prep Time: 5 minutes
Cook Time: 4 minutes
Additional Time: 1 hour
Total Time: 1 hour 9 minutes

Four ingredient microwave peanut butter fudge is a delicious and simple recipe. The creamy texture and sweet flavor will make everyone think it was made the old fashioned way.


  • 1 cup salted butter, cubed
  • 1 cup creamy peanut butter
  • 1 teaspoon vanilla extract
  • 1 pound powdered sugar


  1. Cube the butter and add it to a large microwave-safe bowl.
  2. Next, add the peanut butter and microwave the two ingredients for two minutes.
  3. Stir the ingredients and return to the microwave and cook for two more minutes. (Use caution, the bowl and food will be hot).
  4. Next, pour the vanilla extract into the bowl and mix well.
  5. Pour the powdered sugar into the bowl and stir until the powdered sugar is combined.
  6. Press the peanut butter fudge into the 8-inch by 8-inch square pan.
  7. Refrigerate for one to two hours. Cut into small pieces.


Be careful as the ingredients and bowl will be very hot.

Line the pan with parchment paper to lift the fudge out easily. If you don't have parchment paper, line with aluminum foil.

Nutrition Information:
Yield: 25 Serving Size: 1
Amount Per Serving: Calories: 197Total Fat: 12gSaturated Fat: 6gTrans Fat: 0gUnsaturated Fat: 5gCholesterol: 20mgSodium: 108mgCarbohydrates: 21gFiber: 1gSugar: 18gProtein: 2g

Nutrition is approximate.

Did you make this recipe?

Please leave a comment on the blog or share a photo on Pinterest


Monday 19th of December 2022

I use a large cookie sheet to get smaller bite size pieces for bulk events (also makes it last longer). Just did my second batch made with Reese's Peanut Butter Sauce and am thinking a dark chocolate or milk chocolate drizzle would compliment this recipe. How would you recommend doing this without giving a hard crunch to the soft bite?


Wednesday 21st of December 2022

@Julie Pollitt, Thanks for responding! What ratio of chocolate chips per half teaspoon would that be, 1 cup per 1/2 teaspoon? (Sorry for the additional question, inexperienced chef here)

Julie Pollitt

Tuesday 20th of December 2022

Hi Josh,

What a great idea! I would probably microwave chocolate chips with about half a teaspoon of coconut oil to keep it soft. Maybe a tad more. That should help, and not make it too greasy.


Tuesday 18th of October 2022

I have made this several times and it very good, but my powdered sugar always seems to get lumps in it and so I have lumpy fudge. I even tried mixing with a mixer to get them out. I have even sifted the sugar and tried it, to no avail. Any ideas? Thanks!

Julie Pollitt

Tuesday 18th of October 2022

Hi Cheryl,

Try using softened butter instead of melted. That might be the issue. Mix the softened butter with the peanut butter and vanilla extract first and then add the powdered sugar and mix.

Let me know how that goes.


Saturday 12th of February 2022

I used to receive your newsletter with your great recipes. But I have not received one in quite a while. Is this feature not available any longer. If not, I will greatly miss them!

Julie Pollitt

Sunday 13th of February 2022

Hi Patricia! You might have to go in and sign up again. I do still have the newsletter! Thanks for your sweet words!


Thursday 6th of January 2022

I have look all thru this post and nowhere is the amount of ingredients listed is a cup of this a teaspoon of that I can't find it please help!!!!

Julie Pollitt

Thursday 6th of January 2022

Hi Helen! Scroll to the bottom of the post. There's a recipe card and all of the measurements and instructions. Or, you can click the "Jump To Recipe" at the top of the post, right under the social media buttons. Hope that helps!

Deborah J Stevanus

Sunday 12th of December 2021

Really excited to try the 4 ingredient microwave fudge

Julie Pollitt

Monday 13th of December 2021

Hope you love it!

Skip to Recipe