Line an 8×8-inch (20×20 cm) square baking pan with parchment paper, leaving some excess paper hanging over the sides. This will make it easier to remove the fudge later.

In a microwave-safe bowl, combine the creamy peanut butter and sweetened condensed milk.

Heat the mixture in the microwave in 30-second intervals, stirring well after each interval. Continue microwaving and stirring until the mixture is smooth and well combined. This usually takes about 2-3 minutes in total.

Pour the peanut butter fudge mixture into the prepared baking pan. Use a spatula to smooth it out evenly.

Place the pan in the refrigerator and let the fudge set for at least 2-3 hours, or until it’s firm.

Once the fudge has set, use the parchment paper to lift it out of the pan. Place it on a cutting board and cut it into small squares or rectangles.

Your two-ingredient peanut butter fudge is ready to enjoy. Serve it as a sweet treat or share it with friends and family.