Microwave Peanut Butter Fudge (Just 3 Ingredients)
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Craving a sweet treat but short on time? This microwave peanut butter fudge recipe is perfect for you! With just 3 simple ingredients and 5 minutes of prep, you can whip up a batch of rich, creamy fudge that will satisfy your sweet tooth. You’ll be amazed at how easy it is to make this decadent dessert using only your microwave.

No need for fancy equipment or hours in the kitchen. This recipe is so quick and simple, you can make it any time a fudge craving strikes. The hardest part is waiting for it to chill in the fridge! Get ready to impress your family and friends with this delicious homemade treat that tastes like it took hours to make.

Exact Ingredients List
You’ll need just 3 simple ingredients to make this yummy peanut butter fudge:
- 8 oz (1 cup) unsalted butter
- 1 cup creamy peanut butter
- 1 pound (about 3 3/4 cups) powdered sugar
The butter should be at room temperature to mix easily. Pick a smooth peanut butter for the best texture. Make sure to measure the powdered sugar carefully.
With these basic items, you can whip up a batch of fudge in no time! The recipe makes 64 small squares, perfect for sharing with friends and family.
Remember to have parchment paper on hand too. It’s not an ingredient, but you’ll need it to line the pan. This keeps the fudge from sticking and makes it easy to lift out.
Instructions
Line an 8×8 inch pan with parchment paper. Make sure the paper hangs over the sides for easy removal later.
Mix butter and peanut butter in a microwave-safe bowl. Microwave for 1 minute, stir, then microwave another minute. Mix well until smooth.
Add powdered sugar to the bowl. Stir fast with a wooden spoon until it looks like thick paste. Work quickly before it sets.
Spread the mix in your lined pan. Put parchment on top and press with your hands to even it out.
Chill the fudge for at least 2 hours in the fridge. Take it out and cut into 1-inch squares with a sharp knife.
Your fudge is ready to eat! Store leftovers in the fridge to keep them fresh.

Tips:
- Use creamy peanut butter for best results
- Stir well after each minute in the microwave
- Press firmly to get an even layer of fudge
Enjoy your quick and easy peanut butter fudge!
Possible Substitutes List
You can swap out some ingredients in this easy fudge recipe. Here are some tasty options:
Peanut Butter Substitutes:
- Almond butter
- Cashew butter
- Sunflower seed butter (for nut-free)
Butter Alternatives:
- Coconut oil
- Vegan butter
Powdered Sugar Swaps:
- Monk fruit sweetener
- Erythritol (for sugar-free)
Want to mix things up? Try these add-ins:
- Chocolate chips
- Chopped nuts
- Shredded coconut
You can also play with flavors. Add a teaspoon of vanilla extract or a dash of cinnamon for extra yum.
Remember, swaps may change the texture and taste a bit. But that’s part of the fun! You get to create your own unique fudge flavor.
How To Make It Diabetes-Friendly
You can tweak this yummy fudge recipe to make it more diabetes-friendly. Try using a sugar-free powdered sweetener instead of regular powdered sugar. This swap can help lower the carb count.
For the peanut butter, pick a natural option with no added sugars. You could also use powdered peanut butter mixed with water. It has less fat than regular peanut butter.
Instead of butter, try using coconut oil. It’s a healthier fat choice. Mix these ingredients the same way as the original recipe.
Remember to watch your portion sizes. Cut the fudge into tiny squares, about 1/2 inch each. This way, you can enjoy a treat without overindulging.
Here’s a quick rundown of the swaps:
- Sugar-free powdered sweetener
- Natural or powdered peanut butter
- Coconut oil
Keep in mind, even with these changes, fudge is still a sweet treat. Eat it in small amounts as part of a balanced diet. Always check with your doctor about fitting sweets into your meal plan.
Tips, Tricks & Storing
When making this yummy peanut butter fudge, use creamy peanut butter for the best texture. Natural peanut butter can work too, but you might need to add a bit more powdered sugar.
Don’t overheat the peanut butter and butter mix. Microwaving in short bursts and stirring in between helps avoid burning.
Work fast when adding the powdered sugar. The mixture sets quickly, so mix it in right away for smooth fudge.
To store your fudge, keep it in an airtight container. It will stay fresh at room temp for about a week.
For longer storage, pop it in the fridge. Your fudge will last up to 2 weeks when chilled.
You can even freeze the fudge for up to 3 months. Just wrap it tightly in plastic wrap and put it in a freezer bag.
Want to jazz up your fudge? Try these fun add-ins:
- Chopped peanuts
- Mini chocolate chips
- Crushed pretzels
To easily cut the fudge, run your knife under hot water first. This helps it slice through smoothly without sticking.