I dont remember where I got this recipe but its great
Easy Cut-Out Oat Cookies
Ingredients (Serves 60)
1 1/2 cups confectioners' sugar
1 cup butter
1 teaspoon vanilla extract
2 1/4 cups all-purpose flour
1 1/4 cup oat flour
1 teaspoon baking soda
To make your own flour, place 1 2/3 cups quick or Old-Fashioned Quaker Oats, uncooked, in blender or food processor. Cover and blend 60 seconds. Makes 1 1/4 cup flour.
In a large bowl, mix together the confectioners' sugar and butter until creamy. Beat in the egg and vanilla.
In a separate bowl, combine all the flours and baking soda. Then stir dry-mix into the creamed mixture. Cover the dough, and chill for 30 minutes to 1 hour.
On a lightly floured surface, roll the dough out to 1/8 inch thickness (if the dough is too thick you will lose some of your shapes). Using cookie cutters, cut dough into desired shapes. Place cookies 2 inches apart onto an ungreased cookie sheet.
Preheat the oven to 375 degrees F (190 degrees C). Bake for 7 to 8 minutes and watch carefully to make sure the cookies don't over-brown. Remove from baking sheets and cool on wire racks. Eat plain or frost with your favorite cookie frosting (these cookies only need a tiny amount of frosting).