Cinnamon Swirl

A guy I used to work with at Intel brought this rich, delicious coffee cake into work a couple of times. His wife wrote up the recipe to share with us all.

3 C flour
1 C sugar
4 tsp baking powder
¼ tsp salt
1 stick melted butter
1 ½ C milk
2 eggs
2 tsp vanilla

Sift together first four ingredients. Mix butter, milk, eggs and vanilla, then stir in dry ingredients. Pour into greased 9×13 pan.
Mix together:
1 stick melted butter
2/3 C brown sugar
1 T flour
1 T cinnamon

Sprinkle over batter and swirl into mixture with fork. Bake at 375° for 25 minutes. Drizzle with powdered sugar icing.