ingredients 2 cups all-purpose flour 1 tablespoon optional and to taste 1 large egg 1 cup granulated sugar 4 tablespoons unsalted butter, melted and cooled slightly 1 teaspoon vanilla extract 1 1/4 cups sour cream (i used lite) 1 3/4 cups frozen blueberries + more for sprinkling on tops* about 2 to 3 tabl