Preheat oven to 325 degrees. Prepare tube pan or two 9x5 loaf pans.
Beat whites with 1 cup of sugar, set aside. Cream butter, work in
flour. Beat yolks together with remaining sugar and vanilla. Stir in
butter mixture. Fold in whites until fully incorporated. Pour into
prepared pans and bake 1 hour and 15 minutes. Cool 10 minutes and
remove from pans.
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NOTES : This is difficult to fold in the whites. It is easier done by
using slow speed on a mixer.
