the guitar pan will make? The instructions say it only takes 1 2 layer cake mix. Can anyone direct me to somewhere to find out the servings?

I can usually get a 2 layer 8" cake from one cake mix so that is probably the amount of servings you would get. Depending on the sizes they cut I would say about 15 to 20 servings. I've never made a guitar cake, so this is just a guesstimate.