Here’s a mix you can make if you arent like betty crocker, but want to be, hahaha 
2 c Flour
1 1/2 c Sugar
3 1/2 ts Baking powder
1 ts Salt
1/2 c Butter
Dash nutmeg
combine flour and sugar, sift twice. Sift again and add baking powder and salt. Cut in butter add or omit nutmeg.
store in covered container in Refrigerator up to 1 month. or freeze up to one 1yr.
To use mix
Combine 3 eggs , 1 1/2 ts vanilla and 1 c whole milk beat well and add all of the mix. Beat 4 min. medium speed.
Divide into 2 greased 9′ layer pans. Bake 350 30-35 min.