Peanut Butter Fudge (3 Ingredients, 5 Minutes, Zero Candy Thermometer)

I don’t say this lightly: this is the easiest fudge you will ever make. No candy thermometer. No scorched pots. No patience required. Just peanut butter, butter, and powdered sugar doing a delicious little magic trick in your microwave. Dangerously addictive. You’ve been warned.

Ingredients

Makes 16 small squares.

  • 1 cup (250g) creamy peanut butter (regular, not natural/drippy)
  • ½ cup (1 stick / 115g) salted butter
  • 2 cups (240g) powdered sugar
  • 1 tsp vanilla extract (optional but recommended)

Optional add-ins: ¼ cup crushed peanuts, chocolate chips on top, or a swirl of melted chocolate.

Step-by-Step Instructions

Step 1: Prep

  1. Line an 8×8 inch pan with parchment paper (leave overhang for easy lifting).

Step 2: Melt

  1. In a large microwave-safe bowl, combine peanut butter and butter.
  2. Microwave for 45 seconds. Stir. Microwave another 20–30 seconds until completely smooth and melted.

Step 3: Mix

  1. Stir in vanilla (if using). Add powdered sugar and mix with a spatula until fully combined. It will look crumbly at first, then come together into a thick, smooth dough.

Step 4: Press & Chill

  1. Press mixture firmly into prepared pan. Smooth the top with a spatula or your hands.
  2. Refrigerate for 1–2 hours until completely firm.

Step 5: Cut & Serve

  1. Lift out of pan using parchment. Cut into small squares (it’s rich!). Serve cold or at room temperature.

Summary

Prep Time: 5 min | Chill Time: 1 hour | Total: 65 min

Yield: 16 pieces | Difficulty: Extremely Easy

Storage Notes

Fridge: 2 weeks in an airtight container. Freezer: 3 months (layer with parchment). Eat straight from the freezer—it’s like peanut butter candy.

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