2 1/2 c. flour, unsifted, unbleached
2 c. sugar
1/2 tsp. baking soda
1 tsp. lemon rind, freshly grated
1 tsp. vanilla
1 c. butter, softened
8 oz. sour cream
3 lg. eggs, room temperature

Combine all ingredients in large mixer bowl. Blend at low speed. Beat 3 minutes at medium speed and pour into greased and floured 12 cup bundt pan or tube pan. Bake at 325 degrees for 60 - 70 minutes until top springs back when touched lightly in center. Cool cake upright in pan 15 minutes. Remove from pan and cool completely. Sprinkle with powdered sugar.