Step 1Heat the oven to 350 degrees. Coat 2 baking sheets with nonstick spray, if using, or line with parchment paper. Set aside.
Step 2Cream the sugar, shortening and salt in a mixing bowl. Mix in the corn syrup. Add the eggs one at a time, beating after each. Beat the mixture until light and fluffy.
Step 3In a separate bowl, combine the cake flour and baking powder. Add to the egg mixture alternately with the milk. Add the vanilla and blend well.
Step 4For each cookie, place 1/4 cup of batter on a baking sheet. Use a knife or offset spatula to shape each cookie into a 4- to 6-inch circle; do not flatten. Space the cookies 2 inches apart.
Step 5Bake until light brown around the edges, 18 to 20 minutes. Cool the cookies completely on wire racks.
Step 6When cool, frost the cookies according to the instructions in Zabar's Black-and-White Cookie recipe.