I found another recipe that you could try. Its untried.

GREAT AMERICAN COOKIE CO. SUGAR COOKIES

1/3 cup butter or margarine, softened
1/3 cup shortening
3/4 cup sugar
1 teaspoon baking powder
pinch salt
1 egg
1 teaspoon vanilla
2 cups all-purpose flour
granulated sugar, colored if desired

Beat butter and shortening thoroughly with an electric mixer or pastry cutter. Add sugar, baking powder and a pinch of salt and mix until well combined. Beat in egg and vanilla then as much flour as you can with the electric mixer. Stir in the remaining flour. Cover and chill for at least 1 hour.

Split the dough in 1/2 and roll one half at a time. Cut out with Valentine cookie cutters. Keep the piece you aren't using in the fridge.

Bake on ungreased cookie sheets for about 7 to 8 minutes at 325 degrees F, I think, until edges are firm and bottoms are lightly browned (don't over cook).

Makes 36 cookies.

These cookies were very good, but there is something in the Great American Cookie that allows it to be super soft on the inside even after spending a night in open air.