Cathy, I have not made these because I am afraid that I would eat them all. I am from NJ and these were a favorite of mine growing up. I hope that this helps you.

Another black and white cookie

1 3/4 cups sugar
1/2 pound butter
4 eggs
1 cup milk
1/2 teaspoon vanilla
1/4 teaspoon lemon extract
2 1/2 cups cake flour
2 1/2 cups all purpose flour
1 teaspoon baking powder
1/2 teaspoon salt

Frosting:
4 cups confectioners' sugar
1/3 to 1/2 cup boiling water
1 ounce bittersweet chocolate

1. In a large mixing bowl combine the sugar and butter until fluffy.
Add eggs, milk, vanilla and lemon extract and mix until smooth. In a
medium bowl, combine flours, baking powder and salt.
2. Add dry ingredients to the wet in batches, stirring well. Drop
soupspoonful of dough 2 inches apart on buttered baking sheets. Bake at
375 degrees until edges begin to brown, 20 to 30 minutes. Let cool
completely.
3. To make frosting, put confectioners' sugar in a bowl. Stir in enough
water to make the mixture thick and spreadable. Remove half the
frosting to the top half of a double boiler over simmering water. Add
chocolate and warm the mixture until chocolate is melted and the
frosting is smooth. Remove from heat. With brush, coat half the cookie
with chocolate frosting and the other half with white frosting. Makes 2
dozen large cookies.