1/2 lb. butter
1 c. sugar
2 eggs
8 oz. sour cream
1 tsp. vanilla
2 c. flour
1 1/2 tsp. baking soda
1/2 c. sugar
1 tsp. cinnamon
1 c. chocolate bits

Mix first 3 ingredients. Add next 4 ingredients. Make cinnamon mixture. Pour 1/2 batter into 13 x 9 inch pan. Spread. Sprinkle 1/2 cinnamon mixture and 1/2 of chocolate bits evenly over batter. Repeat, pressing in bits. Bake at 350 degrees for 30 minutes.