Instructions

1 Preheat oven to 350 degrees F (175 degrees C) grease and flour a 9×13 inch pan.

2 In a medium bowl, stir together the flour, baking powder and soda. Set aside.

3 In a large bowl, cream the butter and 1 cup of sugar. Add eggs, sour cream and vanilla. Mix well.

4 Add the flour mixture and combine. Batter will be thick.

5 In a separate bowl, combine chocolate chips, 1/2 cup sugar and cinnamon. Set aside.

6 Spread half of the cake batter in prepared 9×13 inch pan. Sprinkle half of the chocolate chip mixture over the batter. Repeat with the remaining batter, and then the remaining chocolate chip mixture.

7 Bake at 350 degrees F (175 degrees C) for 25-30 minutes or until a toothpick inserted near the center comes out clean.