2 c. flour
1 1/2 c. sugar
2 tsp. baking powder
1/2 tsp. baking soda
1 1/3 c. sour cream
2/3 c. softened butter
1 tsp. vanilla
3 eggs
1/2 c. sugar
1 tsp. cinnamon
1 (6 oz.) pkg. semi-sweet chocolate chips

Heat oven to 350 degrees (325 for glass pan). Grease 9x13 inch pan. Lightly spoon flour into measuring cup; level off.

In large bowl, combine first nine (9) ingredients. Blend 1 minute at low speed. Beat 3 minutes at medium speed. Pour half of batter (about 2 1/2 cups) into greased pan.

In small bowl, combine the 1/2 cup sugar and cinnamon. Sprinkle half of sugar mixture and chocolate chips over batter. Repeat with remaining batter, sugar mixture and chocolate pieces. Bake for 35 to 50 minutes or until toothpick inserted in center comes out clean.