Place cookie sheets on 2 oven racks. Bake cookies 12 to 15 minutes until browned around edges, rotating cookie sheets between upper and lower racks halfway through baking time. Remove cookies to wire racks to cool. In medium bowl, mix confectioners' sugar and 2 tblsp plus 2 tsp. Repeat with remaining cookies, icing, and pecan halves.
Set cookies aside to allow icing to dry completely.
Store cookies in tightly covered container. Or, you can freeze the dough for up to 2 months. Makes about 5 dozen pecan squares.