Hi, I need to bake a one layer 16 x 12 x 2 inch white cake for a class I am taking next week.  We are going to cut it in half, fill, stack and carve it into a car cake.  I saw Rose’s charts in the back of TCB.  The closest pan size listing she has is 18 x 12 x 2.  The Rose factor for 2 layers is 7 - 8.  Since I am only doing 1 layer I will use either 3.5 or 4 Rose factor.  I would like to use the 4 to make the math easier.  Do I need to leave out some of the batter because there is a 2 inch difference in the pan I am using?  If so how much?  Also do I have to use a heating core?  I don’t think I will because we need to carve this cake.  Any suggestions for baking a 1 layer cake in this size pan is greatly appreciated.  Thanks.  I will try to post a picture if the cake looks decent.  LOL