Custardy Apple Squares is a quick and easy recipe. Peel and slice three apples thinly. Make a batter with flour, baking powder, salt, sugar, butter, milk, eggs, and vanilla. Combine the batter and the apples in a square pan, bake, and 40 minutes later you have a lovely apple cake.
The recipe in Dorie Greenspan's Baking Chez Moi lists variations with pear, mango or quince and additions of rum or other liquor or almond extract.
The simple, unadorned flavor of this cake is what makes it outstanding.