Thumbprint Heart Sugar Cookies

This is a great recipe for little "cupids" to help with!

Makes: 32 cookies

1 (18-oz.) roll Pillsbury® Refrigerated Sugar Cookies
1 egg yolk
10 drops red food color
1/4 cup sugar
Red decorating icing

Freeze cookie dough for 30 minutes. Heat oven to 350°F. Beat egg yolk in small bowl. Add food color; blend well. Cut chilled dough into 1/4-inch slices. Place 2 inches apart on ungreased cookie sheets. Dip thumb or index finger in egg mixture to generously coat with color. Press finger onto each slice of dough at an angle twice to make heart shape. Sprinkle with sugar. Bake at 350°F. for 7 to 11 minutes or until edges are light golden brown. Cool 1 minute; remove from cookie sheets. Cool 5 minutes or until completely cooled. With decorating icing, write names or messages on cookies around heart.