Storage: Cover cooled cake with plastic wrap or aluminum foil and store at room temperature up to 2 days, refrigerate in an airtight container up to 5 days. To freeze, place in a freezer bag and freeze up to 3 months.
Nuts: Nuts are optional in the streusel, walnuts are also a great option.
Pan Variations: This coffee cake can be made in a springform pan for a round coffee cake. Baking time could vary slightly. You can also use this recipe to make apple coffee cake muffins. Bake in lined muffin tins for 20- 22 minutes or until a toothpick inserted comes out clean.
Glaze: Make a brown sugar glaze or powdered sugar glaze if desired and drizzle over apple crumb cake.
Serving Ideas: Serve with a scoop of vanilla ice cream and a drizzle of caramel sauce for a decadent dessert.