The traybake and layer cake make up to 40 servings ... Recipes for larger layer cakes mix and bake one layer at a time, so you can mix a manageable amount of batter and re-use a single large ...
Dusting them with flour before adding to the cake mix can help to reduce this happening. If you want to increase the almond content of this cake add 75g/2½oz diced marzipan when you add the cherries.