This cake is real moist
To bake in an 8 x 8-inch cake pan, cut recipe in half.
                        
                    Mix sugar, oil, egg, brushed pineapple, buttermilk and vanilla.
Stir in flour and baking soda and mix until smooth. Fold in apples.
Pour into a greased and floured 9 x 13" pan (or 8 x 8-inch pan for half recipe)
Mix topping ingredients; sprinkle topping on batter.
Bake at 350 degrees for 40 minutes. Cool on wire rack.