Variations on this cake can be made by simply substituting the flavoring (i.e. lemon extract or rum extract) or by adding the following ingredients:
Spice Cake: Omit the flavoring, and sift in:
1 teaspoon cinnamon
1/2 teaspoon nutmeg
1/4 teaspoon cloves
Chocolate Cake:
Add 2 squares of melted unsweeted chocolate to the milk and egg mixture.