Grapefruit Cake

Cream the butter. Add sugar and cream it until it is dissolved in the butter. Add egg yolks separately, beating after each addition, plus vanilla and grated rinds. (do not use more than 1/2 tsp grated rind because it is bitter if you do). Sift flour, cornstarch, baking powder, salt and nutmeg together. Mix honey with grapefruit juice. Add the dry ingredients and liquids to the butter mixture. Mix only until the batter is smooth, then put it in a buttered 8-inch ring mold. The mold should be two thirds full. Bake the cake in a preheated 375 degree oven for 45 minutes to 1 hour. Let the cake cool for a few minutes, then invert it on a rack and let it cool completely. If you like, ice it with icing sugar icing made with grapefruit juice. Makes 12 pieces.