Cinnamon Coffee Cake II

This recipe is based off CM's Cinnamon Coffee Cake recipe on the Cooks dot com website. However, I made some modifications. This first time I baked it, I used this recipe (original recipe plus first modifications). Then I made some more modifications. Here is how I made mine the second time around:

Cake:

1 cup all purpose flour

1/2 cup wheat flour
2 1/2 tsp. baking powder
1/2 tsp salt
1/2 cup sugar

1/4 tsp cinnamon
1 egg
a little more than 1/4 cup vegetable oil
3/4 cup milk

Cinnamon Crumb Topping:

1/3 cup all purpose flour
1/2 cup sugar
1/4 cup butter, softened
1 teaspoon cinnamon

Steps:

1. Preheat oven to 375°F.
2. Combine dry ingredients for cake. Beat together egg, oil and milk, then add to dry ingredients - add half, combine, then add the second half.
3. Brush a 9-inch circular cake pan with butter. Dust the pan with flour and tap out the excess. Fill pan with cake batter and level off top with a spatula.
4. Make the Cinnamon Crumb Topping and crumble it over the top of the cake. Next, bake the cake.
5. Bake for 20-25 minutes.

My Notes:

The little bit of extra oil took care of the dryness problem. It took 20 mins to bake.