Serious Eats: Recipes
Easy Chocolate Peanut Butter Crunch Fudge
This recipe is adapted from Alton Brown.
This recipe works best with a microwave that has a rotating carousel inside.
Adding the vanilla to the powdered sugar before you add it to the butter-peanut butter mixture will save some time and simplify things.
For best results, vary the cooking time based on the strength of your microwave. This is not an exact science, as both the wattage and size of the microwave will affect the outcome. Use your best judgment based on your experience with your and other microwaves. I have a large, fairly strong microwave and I cut the cooking time down to 1:30 for the first cooking stage and 1:45 for the second stage.