If using the refrigerated cookie dough, cut the dough crosswise into 1/4-inch slices. Place 1 piece of dough on an ungreased cookie sheet. Reshape the dough into a 2 to 2-1/2-inch circle. Press an indentation into the top of the dough circle to create a pumpkin shape. Repeat with the remaining pieces of dough, spacing each circle about 2 inches apart. Bake in a 350 degree F oven for 8 to 10 minutes or until edges are lightly browned. Transfer cookies to wire cooking racks. Cool completely.
To decorate, add food coloring to purchased vanilla frosting to make orange frosting. Spread frosting on sugar cookies*. Decorate with tube frosting and small candies to make a variety of jack o' lantern expressions. Store decorated cookies in an airtight container with waxed paper between layers; serve within 24 hours or freeze up to 3 months. Makes 24 cookies.
*Cover and store any extra frosting in the refrigerator. Let stand at room temperature 30 minutes before using.