1 pkg. white cake mix
1/2 c. cornstarch
1/2 c. brown sugar
3 egg whites
1 c. water
1/2 c. Hellmann's mayonnaise
1 c. finely chopped walnuts
Lg. Cool Whip or whipped cream

Grease and flour two 9 inch round pans. Beat all ingredients except whipped cream together for 3 minutes. Bake at 375 degrees for 25-30 minutes. Cool; split layers; fill with whipped cream. Cover top and sides. Refrigerate.