- Sift sugar through a fine-mesh strainer into a large bowl.
- Heat butter and peanut butter in a saucepan over medium heat. Whisk to combine and cook until bubbles appear on the edges, 3 to 5 minutes. Stir in salt and vanilla extract. Pour over powdered sugar in the bowl. Mix together using a spatula until smooth.
- Spread mixture into an 8×8-inch baking pan lined with plastic wrap. Wrap fully and refrigerate until firm enough to cut but not too hard, 1 to 3 hours.
- Unwrap fudge and cut into small cubes. Let warm up on the counter before cutting if needed.
% Daily Value *
Total Fat: 10 %
Cholesterol: 3 %
Sodium: 2 %
Potassium: 1 %
Total Carbohydrates: 3 %
Dietary Fiber: 1 %
Protein: 3 %