HEAT oven to 325°F.
MIX flour and baking soda until blended. Beat butter and sugar in large bowl with mixer until light and fluffy. Add eggs, 1 at a time, beating well after each addition. Beat in flour mixture alternately with sour cream. Blend in vanilla.
POUR into 10-inch tube pan or 12-cup fluted tube pan sprayed with cooking spray.
BAKE 1 hour 20 min. or until toothpick inserted near center comes out clean. Cool cake in pan 10 min. Loosen cake from sides of pan with knife. Invert onto wire rack; gently remove pan. Cool cake completely.