1 pt. sour cream or half and half
2 tsp. baking soda
1 c. butter
2 c. granulated sugar
4 eggs, beaten
3 c. flour
3 tsp. baking powder
1/2 tsp. salt
2 tsp. vanilla
2 tbsp. ground cinnamon
1/2 c. granulated sugar
1/2 c. chopped nuts (optional)

Mix baking soda into sour cream; set aside. Cream butter and sugar together until light and fluffy. Mix in beaten eggs and sour cream. sift flour with baking powder and salt. Add vanilla. Grease and flour three 9 inch cake pans or one 9 x 13 x 2 inch pan. Pour 1/2 of batter into pan. Mix together remaining ingredients; sprinkle over the batter in the pan. Top with remaining batter and swirl through cake with knife. Bake at 350 degrees for 35 minutes or until lightly browned and toothpick comes out clean when stuck in and pulled from center.