Keep in mind that the additional ingredients will increase the amount of batter you are making. I can easily fill (3) 6 inch round cake pans. Or one huge sheet pan. Or (2) 9 inch pans....you get the idea. You get a lot of cake with this recipe! You *may* find that you need to increase your baking time depending on how full your pan is. 325 is a good temperature as it allows your cake to bake thoroughly throughout without the worry of burning the top. The lower temp and additional bake time allows for a more even bake.