I have a receipe for a rich butter cake which requires 6oz of butter and the sugar, 3 eggs, 8oz plain flour, tbsp milk and 1,5 tsp baking powder. it tells you to use a 8" tin. I have baked this cake before and it barely reached 3/4 height of a 6" tin once baked. How much batter shall I make to bake a 12" square cake? I am thinking x 5 the reciepe but I am not sure its enough.
5x the recipe should be enough if you go by the wilton chart: http://www.wilton.com/cakes/making-cakes/baking-wedding-cake-2-inch-pans.cfm
You could always do 6x just in case, and trim any excess from the top.
Lindy Smith 12" square
1 kg butter
1 kg sugar
1kg SR flour
500g plain flour
6 - 8 tb milk to loosen batter
Properly lined tin for long baking
2 1/4 - 2 1/2 hours
Cool in tin.
Wrap to stand 12 hours before using.