This was adapted from Alton Brown's Recipe. The most important distinction is the added vanilla.
4 1/2 cups all-purpose flour
1 teaspoon baking powder
1/2 teaspoon salt
1 1/2 cup unsalted butter, softened
1 1/2 cup sugar
1 egg plus one yolk, beaten
1 1/2 tablespoon milk
1 t vanilla extract
Powdered sugar, for rolling out dough
Mix flour, baking powder, and salt and whisk to combine.
Place butter and sugar in large bowl of electric stand mixer and beat until light in color.
Add egg, yolk, vanilla and milk and beat to combine.
Slowly add flour mixture, and beat until mixture pulls away from the side of the bowl.
Divide the dough in half, wrap in waxed paper, and refrigerate for 2 hours.
Preheat oven to 375 degrees F.
Sprinkle surface where you will roll out dough with powdered sugar.
Remove 1/2 of dough from refrigerator at a time, sprinkle rolling pin with powdered sugar, and roll out dough to 1/4-inch thick.
Cut into desired shape. I am thinking hearts? ;) At this point I am going to press in some heart shaped candies I bought. I don't know if they will melt. I really do not want to ice them, but I may have to.
Place at least 1-inch apart on greased baking sheet, parchment, or silpat, and bake for 7 to 9 minutes or until cookies are just beginning to turn brown around the edges.
Cool on sheet for two minutes, then move to a cooling rack to cool completely.
Makes about 4 dozen cookies, but of course that depends on how large you make them.