Return to top
featured in… The Huffington Post CookingLight Reader's Digest Women's Health BuzzFeed Glamour Whole Foods Oprah Winfrey Network CNN Food Network Healthline Shape

Hello! I’m Anjali. I’m a board certified health coach, author, wife, mom and food lover from the SF Bay area (now living in Seattle, WA!); with a passion for delicious food and a desire to make healthy eating easy, tasty and fun! Learn more about me here and stay for a while!

Anjali Shah

Microwave Peanut Butter Fudge

This post may contain affiliate links. As an Amazon Associate, I earn from qualifying purchases. Please read my disclosure.

This easy microwave peanut butter fudge recipe is going to become one of your favorite desserts! Finished off with a creamy texture that is accented by buttery and sweet flavors, this easy fudge recipe is delicious and perfect for any time of year.

Microwave peanut butter fudge cut into squares, stacked on parchment paper.

Sweet and made within minutes, this creamy peanut butter fudge is one of the best dessert recipes! It’s super easy to make and tastes great every single time. Made with unsalted butter, powdered sugar, vanilla, and natural peanut butter, you will not be able to get enough of this delicious microwave peanut butter fudge.

The options are limitless with this quick peanut butter fudge because you can add sea salt flakes, chocolate ganache, shredded coconut, and so much more: whatever you want! This simple recipe comes together within 15 minutes and will totally satisfy your sweet tooth.

Just like some traditional fudge recipes, you’ll want to make sure you make this fudge for your favorite holidays and occasions. This creamy fudge is great for gift-giving and is perfect for your dessert table!

👩🏽‍🍳 Why You’ll Love This Recipe

  • Gluten-Free: You’ll love this gluten-free dessert! You don’t have to worry about wheat in this recipe.
  • Easy To Make: With only 4 ingredients (not including salt) and simple, fool-proof steps, this homemade peanut butter fudge recipe is perfect for when you don’t have a lot of time to make a dessert but want to keep a dazzling wow factor.
  • Versatile: This is the perfect treat for the holiday season and is great for the peanut butter lover in your life, but it also works whenever you’re craving something sweet! You can also customize it in a variety of ways!
  • Prepared In Minutes: Since homemade fudge is prepared in the microwave, it’s almost effortless! Just a few trips back and forth to the microwave and fridge. The prep time is so easy!
  • Delicious Treat: Rich peanut butter is combined with butter and sugar for a nutty and sweet combination. The powdered sugar adds just enough sweetness to one of the easiest traditional fudge recipes out there!

🥘 Ingredients

This microwaveable peanut butter fudge uses only a handful of simple ingredients, easily found at most grocery stores! You really won’t need much for this easy fudge.

Ingredients for easy microwave peanut butter fudge recipe on a white background.
  • Butter: You can use either salted or unsalted butter for this easy peanut butter fudge in the microwave. Both are fine!
  • Peanut Butter: I used creamy peanut butter, but you could also try crunchy peanut butter for some additional textures.
  • Powdered Sugar: You’ll want to make sure the powdered sugar is sifted! The powdered sugar adds just the perfect amount of sweetness needed for this pb microwave fudge.
  • Vanilla Extract: What’s a dessert recipe without vanilla extract? The vanilla extract is well-rounded and balanced, and brings out the peanut butter flavor in this easy recipe.

🍲 Ingredient Substitutions

  • Extract: Try using a nutty extract like almond or add another flavor that you like. 
  • Sugar: Use an alternative low-carb powdered sugar instead of regular powdered sugar.

🔪 How To Make Microwave Peanut Butter Fudge

Here’s how to make this easy peanut butter fudge recipe. For more detailed instructions and nutrition facts, see the recipe card below.

Prep & Mix: Chop the butter into small pieces. Next, mix peanut butter and butter in a large microwave-safe bowl. (I used a 4-quart, large glass bowl).

peanut butter and butter in a bowl

Microwave: Place the bowl in the microwave and microwave fudge on high heat in 30-second intervals until melted. Stir and repeat.

Note: learn more about cooking in a microwave airfryer combo in my complete guideline.

ingredients in a mixing bowl

Add Sugar: Carefully remove the bowl from the microwave and add the powdered sugar, salt, and vanilla extract. Stir with a wooden spoon until combined.

powdered sugar added to bowl

Move To Baking Dish: Line an 8-inch square pan with parchment or wax paper and transfer the peanut butter mixture into the pan or baking dish.

fudge added to baking pan

Refrigerate: Next, place the microwave pb fudge mixture in the refrigerator for at least two hours until the fudge sets. Finally, cut the fudge into 20 small squares (approx 1-inch pieces). Enjoy!

Easy microwave peanut butter fudge cut into squares on parchment paper.

Chocolate and peanut butter is a winning combination! If you love the flavor of Reese’s peanut butter cups, you can drizzle dark chocolate over this delicious peanut butter fudge to make dark chocolate peanut butter fudge!

Microwave peanut butter fudge, topped with a chocolate drizzle, cut into squares on parchment paper.

💭 Expert Tips

  • Use Kitchen Tools For Precision: Use a candy thermometer if you need to make sure the liquid is warm enough. Also, use a sharp knife when cutting the fudge into small or large pieces.
  • Melt Fully: For best results, make sure the peanut butter and butter mixture is melted all the way, but don’t microwave it longer than that or your no-bake peanut butter fudge will become tough.
  • Be Careful: Make sure to use caution when heating the peanut butter and butter in the microwave. Don’t burn yourself!
  • Snag A Good Piece: The corner pieces are the best part!

📖 Variations

You can customize this basic recipe in so many different ways! Here are some of our favorite ways to change things up:

  • Enhance Flavors: Add some vanilla frosting if you prefer to step this recipe for microwave peanut butter fudge up a notch. You could also stir in some sweetened condensed milk for a creamy version. Don’t have ganache? Just melt some dark or milk chocolate chips (or any type of chocolate chip) and drizzle the melted chocolate over the fudge! White chocolate would also taste good here.
  • Additions And Toppings: Feel free to throw in some sea salt flakes, shredded coconut, chopped nuts, or chocolate chips to the top of the fudge for bonus flavors. This fudge would also taste good with a little brown sugar added.

🍽 Serving Suggestions

This quick dessert can be served with a simple glass of milk (or your favorite dairy-free alternative), or you can make it even more decadent with some sides or toppings. 

🙌 Dietary Adaptations

  • Vegan And Dairy-Free Option: For a vegan version, you could try using vegan butter with vegan friendly sugar.
  • Keto Option: For a keto version, use powdered Swerve instead of regular sugar.
  • Peanut-Free Option: Experiment with using other nut or seed butters in this super easy pb fudge like almond butter or sunflower seed butter.
  • Reduce Sugar And Carbs: If you like a less-sweet fudge, cut the amount of sugar in half. Then each piece of fudge will only have 219 calories and 7.5 grams of sugar!

🫙 Storage Directions

  • Room Temperature: Even though fudge contains perishable ingredients (butter/dairy), the sugar helps to make the fudge more shelf stable. If you keep these peanut butter cubes in an airtight container, layered with aluminum foil or parchment paper, and keep it in a cool dark space (like a cupboard or the pantry), it will last for about 1 week at room temperature.
  • To Refrigerate: Keep the pieces of fudge in an airtight container or wrapped in plastic wrap in the fridge for up to 2 weeks.
  • To Freeze: Fudge freezes well! Just place the fudge in a freezer-safe storage container or bag and freeze for up to two to three months.

❓Recipe FAQs

Why won’t my peanut butter fudge harden?

It’s possible that the fudge mixture didn’t cook long enough! Also, make sure the fudge has had plenty of time to set in the refrigerator.

IS IT SAFE TO MELT PEANUT BUTTER IN THE MICROWAVE?

Absolutely! You may want to warm it in intervals so that you don’t overdo it, but you can definitely melt peanut butter in the microwave.

WHY IS MY PEANUT BUTTER FUDGE HARD?

Peanut butter fudge that is hard has likely been overcooked. If you’re cooking the fudge mixture on the stovetop and you cook it for too long or at too high a temperature, then it will become hard and crumbly once it’s cooled.

How can you tell if peanut butter fudge is bad?

If the fudge is bad, then it will have some discoloration.

Easy microwave peanut butter fudge cut into squares on parchment paper.

🍪 More Easy Dessert Recipes!

Love this plant based dessert recipe? Please leave a 5-star rating 🌟 in the recipe below and/or a review in the comments section further down the page!

You can also FOLLOW ME on FACEBOOK, TWITTER, INSTAGRAM, and PINTEREST to see more delicious, healthy, family-friendly food, and if you have any questions, I’m here to help!

📋 Recipe Card

Microwave peanut butter fudge cut into squares, stacked on parchment paper.
Print Recipe
5 from 14 votes

Microwave Peanut Butter Fudge

This easy microwave peanut butter fudge recipe is going to become one of your favorite desserts! Finished off with a creamy texture that is accented by buttery and sweet flavors, this easy fudge recipe is delicious and perfect for any time of year.
Prep Time15 minutes
Waiting Time2 hours
Total Time2 hours 15 minutes
Course: Dessert
Cuisine: American
Diet: Gluten Free, Vegetarian
Servings: 20 squares
Calories: 242kcal
Author: Anjali Shah

Ingredients

Instructions

  • First, chop the butter into small cubes.
  • Add the butter and peanut butter into a medium-sized microwave-safe bowl.
  • Place it in the microwave for 30 seconds, stir, and repeat until it is all melted and combined.
  • Remove the peanut butter mixture from the microwave and add powdered sugar, salt, and vanilla extract. Stir until well combined.
  • Prepare an 8" square pan with parchment paper. Place the mixture in the pan and extend it evenly.
  • Place the fudge in the refirigerator for at least two hours until it hardens.
  • Cut the fudge into 20 small squares, serve and enjoy.

Notes

  • Keep the pieces of fudge in an airtight container in the fridge for up to 2 weeks.
  • For best results, make sure the peanut butter and butter mixture is melted all the way.
  • Use a candy thermometer if you need to make sure the liquid is warm enough.
  • Use a sharp knife when cutting the fudge into small or large pieces.
  • Make sure to use caution when heating the peanut butter and butter in the microwave. Don’t burn yourself!
  • The corner pieces are the best part!
  • Fudge freezes well! Just place the fudge in a freezer-safe storage container or bag and freeze for up to two to three months.
  • If you like a less-sweet fudge, cut the amount of sugar in half. Then each piece of fudge will only have 219 calories and 7.5 grams of sugar!

Nutrition

Serving: 1piece | Calories: 242kcal | Carbohydrates: 16g | Protein: 5g | Fat: 19g | Saturated Fat: 8g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 7g | Trans Fat: 1g | Cholesterol: 24mg | Sodium: 199mg | Potassium: 129mg | Fiber: 1g | Sugar: 14g

25 responses to “Microwave Peanut Butter Fudge”

  1. This was such an easy recipe that does not disappoint! Turned out rich, creamy and delicious; easily, a new favorite treat!5 stars

  2. This delicious, quick and simple peanut butter fudge is calling my name. It definitely won’t last long in my house.5 stars

  3. OMG! This peanut butter fudge is the best treat thats easy to make. I usually have it with my coffee and sometimes I drop one in it. Gives my coffee flavor!5 stars

  4. It’s absolutely dangerous how easy this peanut butter fudge is to make! I would definitely drizzle some dark chocolate over the top, it’s impossible to beat that chocolate/PB combo!5 stars

      • While peanut butter is excellent, I wonder 🤔 it this microwave fudge is available in chocolate? Help me, please.5 stars

      • Hi MaryAlice! I haven’t made this recipe with just chocolate – but you could try substituting the peanut butter for an equal amount of melted chocolate and see how it works in this recipe (it would be an experiment, since I can’t tell you whether it actually would work well or not!)

  5. Oh my goodness! We made this today and this recipe was so easy, and so delicious! My hubby and daughter absolutely loved this, and devoured so much! I can’t wait to make this again soon!5 stars

  6. Peanut butter is my all-time weakness! I love how lovely this looks for gifting or snacking!5 stars

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe Rating




Subscribe to newsletter

Copyright 2024 The Picky Eater®, LLC. All rights reserved.