Rich, creamy, and ready in minutes—this 2-ingredient peanut butter fudge is the easiest fudge recipe you’ll ever make. All you need is peanut butter, a tub of vanilla frosting, and a microwave.

Stack of smooth, light brown peanut butter fudge cubes arranged on a white plate. In the background, jars of Jif peanut butter and Betty Crocker vanilla frosting are slightly blurred, with more fudge pieces visible on parchment paper.

It’s the perfect no-bake sweet treat to keep in your fridge, serve on a dessert tray, or wrap up for gifting. If you’ve tried my 3 ingredient Oreo fudge or 3 ingredient chocolate peanut butter fudge you already know how quick and satisfying microwave fudge can be.

This version cuts it down to just two pantry staples but still delivers that smooth, melt-in-your-mouth texture of classic fudge.

If you’ve got frosting and a jar of peanut butter on hand, you’re already halfway there.

Peanut butter fudge pieces in a holiday tin. Christmas ornaments and a jar of Jif peanut butter are visible in the background.

Why you’ll love this recipe

Made with just 2 simple ingredients!
Packed with rich peanut butter flavor.
No stovetop or candy thermometer required.
Quick prep—ready to slice in 2 hours
Perfect for gifting, holidays, or anytime snacking

Ingredients for Peanut Butter Fudge with Frosting

This section includes ingredient notes and substitution options. Get all measurements, ingredients, and instructions in the printable recipe card at the end of this post.

Overhead view of a baking pan containing a jar of Jif creamy peanut butter and a container of Betty Crocker Rich & Creamy vanilla frosting.

Creamy peanut butter – Use a smooth peanut butter such as Skippy or Jif. Avoid natural peanut butter—it tends to separate and won’t set well.
Vanilla frosting – I use Betty Crocker’s Rich & Creamy frosting, but any tub-style frosting will work. Chocolate frosting also works for a twist!

Frosting Notes

I tested this two-ingredient fudge recipe with both vanilla frosting and cream cheese frosting, and the difference was clear.

The fudge made with vanilla frosting set beautifully and had that classic smooth, creamy texture.

The cream cheese frosting version, on the other hand, stayed soft and mushy—even after chilling for 24 hours—and didn’t taste as good either. The tangy flavor clashed with the peanut butter, and the texture just wasn’t fudge-like.

Bottom line: Stick with tub-style vanilla frosting for the best results.

How to Make Peanut Butter and Frosting Fudge

This section shows you how to make the recipe with step-by-step photos and instructions. For the full printable recipe, see the recipe card below.

Step 1: In a microwave-safe bowl, combine the peanut butter and frosting. Microwave for 30 seconds, stir, then microwave for another 30 seconds. Stir until smooth.

Side-by-side images of frosting and peanut butter being mixed in a bowl.

Step 2: Transfer the 2-ingredient fudge mixture to a parchment-lined 9×9 pan. Use an offset spatula to spread it into a smooth, even layer.

Step 3: Chill for at least 2 hours, until set. Lift out, use a sharp knife to slice into squares, and enjoy!

Side-by-side images of uncut and sliced peanut butter fudge in a baking pan.

Pro Tip:

Line your pan with parchment paper or aluminum foil and leave it hanging over the edges of the baking dish so you can easily lift the fudge out of the pan before cutting.

Storage

Refrigerator: Store in an airtight container for up to 2 weeks.

Freezer: Transfer the pieces to a freezer bag and layer with parchment paper to prevent sticking together. These will keep frozen for up to 3 months. Thaw in the fridge before serving.

Recipe Tips

Don’t use natural peanut butter—it won’t set properly.
Great for making ahead, as the pieces keep fresh for weeks.
For clean cuts, warm your knife under hot water and wipe it dry between slices.

Hand picking up a square of peanut butter fudge.

Additions and variations

Swap the frosting. Chocolate frosting makes a delicious variation.
Add chocolate. Melt chocolate chips and swirl melted chocolate on top before chilling.
Sweet and salty. Sprinkle with flaked sea salt for contrast.
Flavor boost. Add ½ teaspoon vanilla extract.
Try a different nut butter. Cashew butter or almond butter could be tasty!

More Easy Fudge Recipes

Several cubes of peanut butter fudge resting on parchment paper. A Jif peanut butter jar and a can of frosting are blurred in the background.

Recipe

Stack of peanut butter fudge on a white plate.

Recipe

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2-Ingredient Peanut Butter Fudge

Author: Jaclyn

Prep: 4

Cook: 1

Set time 2

Total: 2 5

This 2-ingredient peanut butter fudge is rich, creamy, and unbelievably easy—just peanut butter and frosting, melted and chilled to perfection. No baking or cooking required!

Ingredients

▢ 18 oz creamy peanut butter
▢ 16 oz vanilla frosting

Instructions

Line a square 9×9 pan (or 8×8) with parchment paper. Set aside.
Combine peanut butter and frosting in a microwave-safe bowl.
Microwave for 30 seconds and stir. Return to microwave for an additional 30 seconds; stir well.
Transfer the fudge mixture into the prepared pan. Use an offset spatula to smooth into an even layer.
Refrigerate for 2 hours or until set.
Slice into bite-sized squares and serve.

Notes

Peanut Butter: I used Jif. You can use your favorite brand of peanut butter but I do not recommend using a natural peanut butter as the fudge won’t set up properly.

Frosting: I used Betty Crocker Vanilla frosting but again, feel free to use your favorite brand.

Storage: Store in an airtight container in the refrigerator for up to 2 weeks.