Peanut Butter Fudge Recipe Using Icing: 3-Ingredient No-Bake Decadence

This no-bake fudge delivers rich, creamy decadence with just three ingredients and zero oven time. I perfected this method after years of testing, and it never fails to impress.

The secret lies in combining peanut butter with vanilla icing, which creates a smooth, velvety texture that sets perfectly at room temperature. No candy thermometer or complicated techniques required.

What you get is a foolproof treat that’s ready in 15 minutes of prep time, plus 1 hour to set. Each square offers that classic peanut butter flavor with a melt-in-your-mouth consistency.

Perfect for gifting, potlucks, or satisfying a sudden sweet tooth. Here’s how to make it.

Ingredients for Peanut Butter Fudge Recipe Using Icing

Five simple ingredients transform into this no-bake treat with zero oven time.

The peanut butter is the star here. Jif or Skippy work perfectly—just make sure it’s the creamy kind, not natural (the oil separation messes with the texture). I always grab the big jars from Costco since this recipe disappears fast. The vanilla icing needs to be the fluffy, white kind in the can—Betty Crocker or Pillsbury are reliable. Don’t use the buttercream style; it’s too thick.

No canned icing? Homemade buttercream works if you adjust the sugar ratio. Short on powdered sugar? Granulated sugar pulsed in a blender gets you close (sift it after). The vanilla extract can be swapped for almond extract if you want a different twist. The salt is non-negotiable though—it balances all that sweetness.

This keeps at room temp for 3 days in an airtight container, or 1 week in the fridge. Freezes beautifully (if it lasts that long) for 2 months. Cut into squares before storing so it’s grab-and-go.

Step-by-Step Instructions for Peanut Butter Fudge Using Icing

Here’s the method. Straightforward, tested, works every time.

Step 1: Combine Peanut Butter and Vanilla Icing

In a large microwave-safe bowl, add the 1.5 cups Creamy Peanut Butter and the entire 1 can Vanilla Icing. I use a smooth, no-stir peanut butter here—it blends seamlessly without any oil separation issues that can affect texture.

Microwave on high for 1 minute, then pause to stir thoroughly. The mixture should be smooth and glossy, with no visible streaks of icing remaining. If it’s not fully combined, return it to the microwave for 15-20 second intervals, stirring between each, until completely melted and uniform.

Step 2: Incorporate Powdered Sugar and Flavorings

Gradually add the 2 cups Powdered Sugar to the peanut butter mixture, about ½ cup at a time, stirring well after each addition. This prevents clumping and ensures the sugar dissolves evenly into the warm base.

Once the sugar is fully incorporated, stir in the 1 tsp Vanilla Extract and 0.25 tsp Salt. The vanilla extract enhances the peanut butter’s nuttiness, while the salt balances the sweetness—this is where the flavor truly comes alive.

Step 3: Chill to Set the Fudge

Line an 8×8-inch baking dish with parchment paper, leaving an overhang on the sides for easy removal. Transfer the fudge mixture into the prepared dish and use a spatula to spread it into an even layer.

Refrigerate uncovered for at least 2 hours, or until the fudge is completely firm to the touch. You’ll know it’s ready when the top is no longer tacky and a toothpick inserted comes out clean. I often let mine set overnight for the cleanest cuts.

Step 4: Slice and Serve

Remove the fudge from the refrigerator and lift it out of the dish using the parchment paper overhang. Place it on a cutting board and use a sharp knife to cut into 1-inch squares—this yields exactly 16 servings.

The fudge should have a smooth, velvety texture with a rich, creamy peanut butter flavor. If the knife sticks while cutting, simply dip it in hot water and wipe it clean between slices. Store any leftovers in an airtight container in the refrigerator for up to 1 week.

Flavor Customization for These Flavors

Chocolate Lovers

Add ½ cup cocoa powder with the powdered sugar for a rich chocolate-peanut butter hybrid. I sift the cocoa first to avoid lumps. This creates a fudge reminiscent of Reese’s cups. 💛

Crunchy Texture

Stir in ½ cup chopped peanuts or rice krispies after combining all wet ingredients. The crunch contrasts beautifully with the creamy base. Press miniature marshmallows on top before chilling for a s’mores twist.

Salted Caramel

Swirl ¼ cup caramel sauce into the mixture before chilling, then sprinkle with flaky sea salt. Use store-bought sauce or make your own. The salt enhances all the sweet, nutty flavors.

Fruit Infusion

Fold in ½ cup dried cranberries or chopped dried apricots for a fruity contrast. I soak the fruit in warm water for 10 minutes first to soften. This adds a sophisticated touch that cuts through the richness.

Spiced Version

Add ½ tsp cinnamon and ¼ tsp nutmeg with the vanilla extract. These warm spices complement the peanut butter beautifully. I sometimes add a pinch of cayenne for a subtle kick. ✨

Nutty Variations

Swap peanut butter for almond butter or cashew butter for different nut flavors. Use the same 1.5 cups measurement. Each creates a unique twist while maintaining the same creamy texture.

Frequently Asked Questions