2 cups all-purpose flour
1 cup butter, softened
1 cup powdered sugar
1 teaspoon vanilla
Preheat oven to 350F.
Lightly grease a cookie sheet.
Mix together flour, powdered sugar, butter, egg, and vanilla.
Shape dough in to 1-1/2 inch rounds, and place on cookie sheet.
Press down the center with your thumb.
Fill each hole with jam.
Bake 12 minutes, or until the bottoms are lightly browned.