This moist blueberry oatmeal loaf cake is just the right size for most families. Feel free to use frozen blueberries in this cake if you don't have fresh. The dense texture of the cake is more like a quick bread or muffins than a cake. I used vanilla yogurt in this cake, but sour cream or greek yogurt may be used as well. Use old-fashioned or quick oats in this cake. Add 1/2 cup of chopped pecans or walnuts to the cake for an extra crunchy texture.