Step 1

Line an 8x8 baking pan with parchment paper or foil. Note: you can use a 9x9 pan, or even a loaf pan.

Step 2

Using a heavy bottomed saucepan melt the butter and peanut butter together over medium heat. Stir constantly to get the mixture well combined.

Step 3

Turn the heat down to low and stir in the vanilla and salt.

Step 4

Fold in the sugar with a silicone spatula or spoon. Make sure to get all the sugar incorporated and the fudge nice and smooth. The low heat will help this process.

Step 5

When the fudge is smooth transfer to your prepared pan and spread out evenly with an offset spatula.

Step 6

Let chill for at least 2 hours before slicing into small squares. If you have lined your pan with parchment paper or foil you can gently lift it out for neater slicing.

Step 7

Fudge can be stored at room temperature, or in the refrigerator. It also freezes well.