2-Ingredient Peanut Butter Fudge
This is the easiest, fastest, and most foolproof fudge recipe you’ll ever make. It’s rich, creamy, and requires zero candy thermometers or special techniques.
Ingredients
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1 (16 oz / 450g) jar of creamy peanut butter (not natural/oily style—use conventional like Jif or Skippy for best results)
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1 (16 oz / 450g) container of vanilla frosting (or cream cheese frosting)
Optional add-ins for variation:
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A pinch of salt (if using unsalted peanut butter)
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1 tsp vanilla extract
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Chopped peanuts, mini chocolate chips, or a drizzle of melted chocolate on top
Instructions
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Prep: Line an 8×8 inch (20×20 cm) baking dish with parchment paper, leaving some overhang on the sides for easy removal.
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Melt: In a large, microwave-safe bowl, spoon in the entire container of frosting and the entire jar of peanut butter. Microwave on high for 60-90 seconds, stopping to stir every 30 seconds, until completely melted and smooth. (You can also do this in a saucepan over low heat on the stovetop, stirring constantly.)
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Combine: Stir the mixture vigorously until it is fully blended, glossy, and uniform. If using any optional add-ins (besides toppings), stir them in now.
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Set: Pour the mixture into the prepared pan. Smooth the top with a spatula. If desired, sprinkle with chopped peanuts or press in mini chocolate chips.
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Chill: Refrigerate for at least 2-3 hours, or until completely firm.
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Cut: Use the parchment paper to lift the fudge slab out of the pan. Place on a cutting board and slice into small squares (it’s very rich!).
Pro Tips & Notes
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Peanut Butter is Key: For the proper texture, use regular creamy peanut butter, not the natural kind that separates. The stabilizers in conventional peanut butter are what help the fudge set correctly.
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Frosting Choice: Vanilla or cream cheese frosting works best. Chocolate frosting can be used, but it will overpower the peanut butter flavor.
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Storage: Keep fudge in an airtight container in the refrigerator for up to 2 weeks. It can also be frozen for up to 3 months.
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Too Soft? If your fudge doesn’t set firmly, it’s likely due to the specific brands used. Simply pop it in the freezer for 30 minutes before cutting.
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Why It Works: The frosting contains the exact right balance of sugar and fat (from icing sugar and shortening/oil) to create a stable, creamy fudge base when combined with the peanut butter’s oils and solids.
Enjoy your impossibly easy, decadent homemade fudge!