Name: Peanut Butter Microwave Fudge
Prep time: 5 min
Cook time: 2 min
Total time: 20 min
Cuisine: American
Ingredients: 1 box confectioners’ sugar (approximately 16 ounces); 2 tablespoons butter; 1/3 cup milk; 1 cup peanut butter

Why You’ll Love Peanut Butter Microwave Fudge Recipe

This peanut butter microwave fudge is not only quick and easy to make, but it’s also incredibly satisfying. There’s no need for candy thermometers or complicated steps—just mix, microwave, and set. Its smooth, melt-in-your-mouth texture and rich peanut butter flavor make it a crowd-pleaser. It’s perfect for last-minute gifts, potlucks, or a quick after-dinner sweet fix.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

1 box confectioners’ sugar (approximately 16 ounces)
2 tablespoons butter
1/3 cup milk
1 cup peanut butter

Directions

Combine Ingredients: In a large microwave-safe mixing bowl, combine the confectioners’ sugar, butter, and milk.
Microwave and Mix: Microwave the mixture on high for 2 minutes. Remove and beat with a hand mixer until smooth. Return to the microwave for an additional 30 seconds.
Add Peanut Butter: Stir in the peanut butter and mix by hand or with a mixer until fully incorporated and smooth.
Spread and Cool: Pour the fudge mixture into a foil-lined 8×8-inch pan and smooth the top with a spatula. Let it cool at room temperature until firm.
Cut and Serve: Once fully set, cut into squares and serve. Enjoy as a quick treat or share with friends and family.

Servings and timing

Prep Time: 5 minutes
Setting Time: 15 minutes
Total Time: 20 minutes
Servings: 16 pieces
Calories: Approximately 150 kcal per piece

Variations

Chocolate Peanut Butter Fudge: Add 1/2 cup of melted chocolate chips to the mixture for a rich chocolate twist.
Crunchy Fudge: Use crunchy peanut butter or fold in chopped peanuts for added texture.
Layered Fudge: Pour half the peanut butter mixture into the pan, top with melted chocolate, and then layer the remaining fudge.
Vegan Option: Substitute the milk with a plant-based milk and use vegan butter.
Sweet & Salty: Sprinkle a little sea salt on top before setting for a salty contrast.

Storage/Reheating

Store the fudge in an airtight container at room temperature for up to 1 week. For longer storage, refrigerate for up to 2 weeks. To freeze, place the pieces in a freezer-safe container separated by parchment paper and freeze for up to 2 months. Thaw at room temperature before serving. This fudge does not require reheating but can be slightly warmed in the microwave for a softer texture if desired.

FAQs

What type of peanut butter works best for this recipe?

Creamy peanut butter is ideal for a smooth texture, but crunchy can be used for added crunch.

Can I use natural peanut butter?

Yes, but make sure it’s well stirred. Natural peanut butter may cause the fudge to be slightly more oily or soft.

Can I double the recipe?

Absolutely. Just use a larger microwave-safe bowl and a 9×13-inch pan to set the fudge.

How do I know when the fudge is set?

The fudge should be firm to the touch and not sticky. It usually sets completely within 15–30 minutes at room temperature.

Can I use almond or cashew butter instead?

Yes, you can substitute peanut butter with other nut butters for a different flavor profile.

Why is my fudge crumbly?

Overheating or using too much sugar can make the fudge crumbly. Be sure to follow the timing and measurements closely.

Can I add mix-ins to the fudge?

Yes, mini chocolate chips, nuts, or even crushed pretzels make great additions.

Is it okay to refrigerate the fudge to speed up setting?

Yes, placing it in the fridge will speed up the setting time, but room temperature works just fine too.

Can this fudge be made dairy-free?

Yes, use a dairy-free milk and vegan butter alternative to make it dairy-free.

What if I don’t have a hand mixer?

You can mix by hand, though it may take a bit more effort to achieve a smooth consistency.

Conclusion

Peanut Butter Microwave Fudge is the ultimate solution for a fast, delicious homemade treat. It’s rich, creamy, and ridiculously easy to make, using just a handful of ingredients you likely already have in your kitchen. Whether you’re preparing it for a special occasion or just need a quick dessert fix, this fudge is sure to impress with minimal effort.