I want to make the frosted pumpkin cake from the Oct. 03 issue, but I forgot to buy the pumpkin pie spice. It calls for 2 tsps. of pumpkin pie spice. I have cinnamon, cloves, ginger, and nutmeg. Does anyone know how I can substitute these spices for the 2 tsps.? I know it's the week-end, but I know that SOME of us don't have lives except for cooking! Thanks.