3 ingredient peanut butter fudge on a silver plate with three pieces stacked one of top of the other with a bite taken out of one, and a bowl of peanuts and more fudge pieces around
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3 Ingredient Peanut Butter Fudge

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4.94 from 15 votes
Easy 3 Ingredient Peanut Butter Fudge ready to set in just 5 minutes using the microwave to heat and combine the ingredients! This PB fudge is so good!

I’ve got a treat for you today that’s as easy as it is delicious – my 3 Ingredient Peanut Butter Fudge. If you’re anything like me and have a soft spot for peanut butter, you’re going to love this. This PB fudge is my go-to recipe when I’m short on time but still want to whip up something that’ll wow everyone. With just butter, creamy peanut butter, and powdered sugar, this 3 ingredient peanut butter fudge is so good.

3 ingredient peanut butter fudge on a silver plate with three pieces stacked one of top of the other with a bite taken out of one, and a bowl of peanuts in the background

This 3 ingredient peanut butter fudge recipe was developed on a lazy weekend when I didn’t have any frosting to make my 2 ingredient peanut butter fudge on hand and didn’t feel like running to the store to get some. This 3 ingredient variation of peanut butter fudge has since become my go-to. It’s creamy, it’s rich, and it’s unbelievably easy to make. I really like the richness and flavor that the butter adds!

3 Ingredient PB Fudge Overview

Cuisine Inspiration: American
Number of Ingredients: 3
Total Cook Time: About 4 hours (including setting time)
Primary Cooking Method: Microwaving and mixing
Dietary Info: Gluten-free (check your peanut butter), Vegetarian
Key Flavor: Creamy Peanut Butter
Skill Level: Beginner

Notable mentions

  • Microwave Method: Who knew your microwave could churn out such awesome PB fudge? Just a few minutes in the microwave and you’re practically done.
  • No Mess, No Stress: This fudge is as easy to clean up as it is to make. I’m talking one bowl, a few utensils, and voilà – you’re back to relaxing with your treat.
  • Pantry Staples to the Rescue: I love a recipe that doesn’t require a grocery run. Grab that peanut butter, butter, and powdered sugar from your pantry and you’re good to go.
  • Straight-Up Simple: Whether you’re new to the kitchen or just looking for an easy peanut butter fudge recipe, this recipe is the ticket. It’s straightforward, foolproof, and totally satisfying.

Ingredients to Make 3 Ingredient Peanut Butter Fudge

  • Unsalted Butter: Start with 1 cup. This is the base that gives our fudge its smooth, melt-in-your-mouth texture.
  • Creamy Peanut Butter: You’ll need 1 cup. Choose your favorite brand here – it’s the star of the show and brings that irresistible peanut butter flavor we all love.
  • Powdered Sugar: Measure out 3 cups. This sweetens the deal and helps the fudge set to just the right consistency.
Overhead shot of 3 ingredient peanut butter fudge stacked one on top of the other, three pieces of fudge in a silver plate, and a bowl of peanuts

How to Make 3 Ingredient Peanut Butter Fudge

Prep Your Pan: First, get your 8×8 inch pan ready. Line it with foil or parchment paper for easy fudge removal, and give it a quick spritz with non-stick cooking spray.

Step 1: Combine Your Ingredients In a microwave-safe bowl, place the unsalted butter and creamy peanut butter. These two are about to become best friends.

Step 2: Microwave and Mix Pop the bowl in the microwave for one minute. Give it a stir – you’re looking for a smooth, well-blended mixture. If it’s not quite there yet, microwave in additional 30-second intervals, stirring after each, until it’s just right.

Step 3: Add the Sweetness Transfer this peanut butter and butter blend to a mixing bowl. Gradually add in your powdered sugar, mixing as you go. You’re aiming for a smooth, fudge-like consistency. Take your time – good things come to those who mix!

Step 4: Set and Spread Scoop your PB fudge mixture into the prepared pan. Spread it out evenly, getting into all the corners. A spatula or the back of a spoon works great for this. You want a nice, smooth top.

Step 5: Patience is Key Let the fudge sit and set at room temperature for about 4 hours. If you’re in a bit of a rush, you can pop it in the fridge for 2 hours.

Step 6: The Final Cut Once your fudge is set and firm, it’s time to slice it up. Cut into your desired sizes, and you’ve got yourself some homemade peanut butter fudge!

A step by step image collage on how to make 3 ingredient peanut butter fudge with ingredients, melting and mixing the ingredients, and placing the mixture in the pan
  • Swap the Butter: If you’re looking for a dairy-free option, try using coconut oil instead of butter. It’ll give a slight coconut flavor, which pairs nicely with peanut butter.
  • Different Nut Butters: Feel adventurous? Swap out peanut butter with almond butter or cashew butter for a different nutty twist.
  • Chocolate Chips: For a chocolate peanut butter version, stir in a handful of chocolate chips after microwaving the peanut butter and butter. They’ll melt into the mixture for a delicious chocolatey swirl.
  • Nuts for Crunch: Add some chopped peanuts, almonds, or pecans if you like a bit of crunch in your fudge. It’s a great way to add texture.
  • Flavor Infusions: A dash of vanilla extract or a pinch of sea salt can elevate the flavor. If you’re a fan of sweet and salty, the sea salt is a must-try.
  • Protein-Packed: For a protein boost, consider stirring in a scoop of your favorite protein powder. This can be a great post-workout treat.
3 ingredient peanut butter fudge sliced in cubes on parchment paper

Tips for Making the Best 3 Ingredient Peanut Butter Fudge

  1. Smooth Consistency is Key: Ensure that your peanut butter and butter mixture is completely smooth and well-blended before adding the powdered sugar. Lumps will affect the texture of your fudge.
  2. Sift Your Powdered Sugar: To avoid clumps and ensure a smooth texture, sift your powdered sugar before adding it to the mixture. This little step can make a big difference.
  3. Let It Set Properly: Resist the temptation to cut into the fudge too soon. Letting it set fully at room temperature or in the fridge ensures that it firms up properly and slices cleanly.
  4. Use Quality Ingredients: Since this recipe has only three ingredients, the quality of each really matters. Use the best peanut butter and butter you can find for superior flavor.
  5. Line Your Pan Well: Make sure your parchment paper or foil extends over the sides of the pan. This creates handles that make it easier to lift out the fudge once it’s set.
  6. Cutting Technique: For clean, even slices, use a sharp knife and dip it in hot water between cuts. This helps to slice through the fudge smoothly without sticking.
3 pieces of 3 ingredient peanut butter fudge stacked on top of each other with more fudge pieces in the background

How to Store 3 Ingredient Peanut Butter Fudge

After your fudge has set and been cut into pieces, store it in an airtight container. To keep the layers from sticking together, you can place a piece of parchment paper between them. It’s best to store the fudge in a cool, dry place. It will last at room temperature for around a week. If your kitchen tends to be warm, you might opt to keep it in the fridge.

How Long Will 3 Ingredient Peanut Butter Fudge Last in the Fridge?

When stored in the refrigerator, your peanut butter fudge can last up to 2 weeks. The cool environment helps maintain its texture and flavor, ensuring that each piece is as delicious as the first.

Can I Freeze 3 Ingredient Peanut Butter Fudge?

Yes, you can freeze this peanut butter fudge. Wrap it tightly in plastic wrap and then place it in a zip-lock freezer bag or an airtight container. It will keep well in the freezer for up to 3 months. When you’re ready to enjoy it, let the fudge thaw in the refrigerator or at room temperature to preserve its texture.

Frequently asked questions

Can I use natural peanut butter for this recipe?

Yes, you can use natural peanut butter, but keep in mind that it may affect the texture slightly due to its oil separation. Stir it well before using.

My fudge is too soft/sticky. What did I do wrong?

If your fudge is too soft or sticky, it might not have been set long enough. Allow it more time in the fridge. Also, ensure you measured the ingredients accurately, especially the powdered sugar.

How do I know when the fudge is set and ready to cut?

The fudge should be firm to the touch and no longer sticky. If it’s set in the fridge, it should also be cold all the way through.

3 ingredient peanut butter fudge in a baking pan lined with parchment paper all stacked pretty

This 3 Ingredient Peanut Butter Fudge is straight up delicious. So, go ahead, cut yourself a piece, or two (I won’t tell!), and enjoy the fruits of your oh-so-easy labor.

More 5 Ingredient or Less Fudge recipes:

I want to hear from you! If you try this easy 3 Ingredient Peanut Butter Fudge recipe or any other of my 5 ingredient or less recipes on Dinner in 5, then don’t forget to rate the recipe and leave a comment below! I read all the comments and respond!

3 ingredient peanut butter fudge on a silver plate with three pieces stacked one of top of the other with a bite taken out of one, and a bowl of peanuts in the background
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3 Ingredient Peanut Butter Fudge

Easy 3 Ingredient Peanut Butter Fudge ready to set in just 5 minutes using the microwave to heat and combine the ingredients! This PB fudge is so good!
4.9 from 15 votes
Author Jackie
Servings 16 servings
Course Dessert
Calories 286
Prep Time 1 minute
Chill Time 2 hours
Cook Time 4 minutes
Total Time 2 hours 5 minutes

Ingredients
  

  • 1 cup unsalted butter
  • 1 cup creamy peanut butter
  • 3 cups powdered sugar

Instructions

  • Prepare an 8×8 inch pan by lining it with foil or parchment paper. Lightly coat it with non-stick cooking spray and set it aside.
  • Place the butter and peanut butter in a microwave-safe bowl. Microwave for one minute, then stir thoroughly. If necessary, microwave in additional 30-second intervals, stirring after each until the mixture is completely smooth.
  • Transfer the smooth peanut butter mixture to the bowl of a stand mixer with the paddle attachment. Gradually add in the powdered sugar and mix on low speed until the sugar is fully incorporated.
  • Scoop the fudge into the prepared pan. Spread it out evenly, pressing down to remove any air bubbles.
  • Let the fudge set at room temperature for about 4 hours, or in the fridge for 2 hours if you want it to set more quickly.
  • Once the fudge is firm, slice it into squares and serve.

Notes

  1. Smooth Consistency is Key: Ensure that your peanut butter and butter mixture is completely smooth and well-blended before adding the powdered sugar. Lumps will affect the texture of your fudge.
  2. Sift Your Powdered Sugar: To avoid clumps and ensure a smooth texture, sift your powdered sugar before adding it to the mixture. This little step can make a big difference.
  3. Let It Set Properly: Resist the temptation to cut into the fudge too soon. Letting it set fully at room temperature or in the fridge ensures that it firms up properly and slices cleanly.
  4. Use Quality Ingredients: Since this recipe has only three ingredients, the quality of each really matters. Use the best peanut butter and butter you can find for superior flavor.
  5. Line Your Pan Well: Make sure your parchment paper or foil extends over the sides of the pan. This creates handles that make it easier to lift out the fudge once it’s set.
  6. Cutting Technique: For clean, even slices, use a sharp knife and dip it in hot water between cuts. This helps to slice through the fudge smoothly without sticking.

Nutrition

Calories: 286kcal, Carbohydrates: 26g, Protein: 4g, Fat: 20g, Saturated Fat: 9g, Polyunsaturated Fat: 2g, Monounsaturated Fat: 7g, Trans Fat: 0.5g, Cholesterol: 31mg, Sodium: 71mg, Potassium: 95mg, Fiber: 1g, Sugar: 24g, Vitamin A: 355IU, Calcium: 12mg, Iron: 0.3mg

Nutrition information provided is an estimate. It will vary based on cooking method and specific ingredients used.

Cuisine American

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