Cinnamon Coffee Cake

Directions

1. 1
   Measure buttermilk, soda in liquid measuring cup, set aside.
2. 2
   In large mixing bowl measure flours, sugar and baking powder.
3. 3
   Blend.
4. 4
   Add egg, oil, vanilla and buttermilk mixture.
5. 5
   Stir to blend.
6. 6
   Spread half of batter in 9x9 greased pan and sprinkle with 13 of topping ( 1/2 cup lightly packed brown sugar, 1 tablespoon cinnamon, 1 tablespoon butter) and cover with rest of batter.
7. 7
   Sprinkle rest of batter on top.
8. 8
   Bake at 350F (180C) for 45 min.
9. 9
   Cool on wire rack.