2-Ingredient Peanut Butter Fudge

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This 2-Ingredient Peanut Butter Fudge is one of the quickest, most foolproof dessert recipes ever created. It requires no candy thermometers, boiling, or complicated steps—just two basic pantry ingredients and a microwave.

The most classic version uses store-bought vanilla frosting (or cream cheese frosting) combined with creamy peanut butter, which sets into a soft, velvety, melt-in-your-mouth fudge.

Ingredients

  • 1 tub (12 to 16 oz) vanilla or cream cheese frosting
  • 1 jar (16 to 18 oz) creamy peanut butter (standard processed peanut butter like Jif or Skippy works best for setting)
(Alternative version: You can also substitute the frosting with 1 can (14 oz) of sweetened condensed milk for a slightly denser, traditional candy texture).

Step-by-Step Instructions

Step 1: Prep the Pan

  1. Line an 8×8-inch baking dish with parchment paper or aluminum foil, leaving enough overhang on the sides to lift the fudge out easily once it sets.

Step 2: Melt and Combine

  1. Remove the lid and foil seal from the frosting tub.
  2. Place the peanut butter and frosting into a large microwave-safe bowl.
  3. Microwave in 30-second intervals, stirring in between, until the mixture is warm, fully melted, and smooth (usually takes 60 to 90 seconds total). Be careful not to overheat to prevent the peanut butter oils from separating.

Step 3: Pour and Smooth

  1. Pour the warm mixture immediately into your prepared baking dish.
  2. Use a spatula to spread it evenly into the corners and smooth out the top.

Step 4: Chill and Slice

  1. Place the pan in the refrigerator for 1 to 2 hours until the fudge is completely firm and set.
  2. Lift the fudge block out of the pan using the parchment paper overhang.
  3. Slice into small bite-sized squares using a sharp knife.

Pro Tips for Success

  • Avoid Natural Peanut Butter: Natural peanut butters that require stirring often have too much free oil, which can prevent the fudge from setting properly and leave it soft.
  • Clean Cuts: Dip your knife in warm water and wipe it clean with a towel between cuts for clean, smooth fudge edges.
  • Optional Mix-ins: Feel free to press sea salt flakes, chopped peanuts, or mini chocolate chips on top before chilling!
  • Storage: Keep the cut fudge in an airtight container in the refrigerator for up to two weeks (or freeze for up to 3 months).

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