Heat oven to 450°F. Unroll crusts on lightly floured work surface. With rolling pin, roll each crust to 11 1/2 inches in diameter. Cut 1 (8 1/2-inch) square out of center of each round. Cut 4 squares from each large square, making 8 (4 1/4-inch) squares. Fold up all sides of each square 1/2 inch and roll inward to form thick crust edge. Brush edges with milk; sprinkle with 2 teaspoons sugar. Place on ungreased large cookie sheet. Bake 6 to 8 minutes or until light golden brown. Cool completely, about 10 minutes.