I did a combination of peanut butter, white chocolate and semi sweet chips since I wanted Jennifer to see how it's done. Also if you are going to add nuts stir them into the fudge while over the heat just to incorporate them. When I did this batch I put the nuts at the bottom of the pan, which you would also do with marshmallows, so that when you flip over the pan to cut them you get the less rough side with the nuts on the top.