Place batter in a greased 8x8 inch baking dish and bake in a preheated 350°F oven for 35-40 minutes or until baked through.
Allow cake to cool in the pan.
Top with powdered sugar and serve.
1 tablespoon powdered sugar
Notes
Use a box grater to grate the apples or a grater with large holes.
Some apples will darken right away. That's okay. The cake is dark from the brown sugar and the apples won't be noticed.
Test cake for doneness by inserting a toothpick in the center of the cake. If many moist crumbs stick to the toothpick, the cake needs a few more minutes. If just a few crumbs are on toothpick, the cake is baked through.
Cake can be served warm or at room temperature.
Add powdered sugar just before serving.
Once the cake has fully cooled, cover and store at room temperature for 2-3 days.