This Old Fashioned Peanut Butter Fudge Recipe is fast and simple to make. It's silky, smooth, and the perfect sweet treat for peanut butter lovers! PREP TIME10 minutes COOK TIME2 hours TOTAL TIME2 hours 10 minutes SERVINGS16 PRINT RECIPEPIN RECIPEREVIEW RECIPE COOK MODEPrevent your screen from going dark Ingredients 1x2x3x 2 cups sugar 1/2 cup brown sugar packed 4 tbsp butter 1/2 cup milk 1 cup peanut butter 1 cup mini marshmallows Instructions Start by boiling both sugars, butter, and milk in a pot until it reaches 236 degrees then immediately stop. Add in peanut butter and marshmallows and whip until it starts to thicken. Pour into a buttered 8″ x 8″ pan. You could also line with parchment paper to make it even easier to take out if you’d like to. It takes about one to two hours for the fudge to harden completely. Wait until cooled to room temperature and slice into squares.