The New Zealand Railways Magazine, Volume 11, Issue 5 (August 1, 1936)
Wonder Cake
Wonder Cake.
1/2 lb. butter, 1/4lb. sugar, 1/2lb. dates—chopped up, 1/4lb. walnuts (if liked), 1/2lb. flour, 1 teaspoon cocoa, 1 teaspoon baking soda, 1 cup milk, 1 teaspoon vinegar, 1 egg. Bake about 30 minutes and ice with butter icing or chocolate. Sprinkle with cocoanut.