Cream butter and sugar. Add egg and vanilla, mixing well. Sift all dry ingredients together. Stir into creamed mixture alternately with milk, beginning and ending with dry ingredients. If batter is too thin, you may add more flour. Be sure whoopie pan is well greased. Drop 1-2 teaspoonfuls into each heart, and smooth out. Bake at 350 degrees for 10 to 12 minutes. Put together with good icing.

I make a simple icing with a bit of butter, vanilla, almond extract, milk, and powdered sugar. However, my great grandma, who came to Missouri by covered wagon in 1905, used a cooked icing she made with the following ingredients: 1 cup sugar, 1 or 2 tbsp butter, 1 tsp vanilla, a dash of salt, and enough cream to set this mixture. She would cook to softball stage and ice cookies on underside, putting together two cookies like a sandwich. Work quickly as this icing sets up fast.