If you have a recipe that calls for white or yellow cake mix, and don't have one on hand, here is a quick substitute. You can either just make enough for one batch, or make several directly into big baggies, to have ready for next time. I use this in recipes like Applesauce Cake or Quick Cobbler.
2 cups flour
1 1/2 cups sugar
1 Tbl baking powder
1/2 cup dry milk
1 tsp vanilla (Only add if using right away, otherwise add the vanilla when preparing recipe.)