Cookie Square directions:
Preheat oven to 350 degrees. Grease a 13x9x2-inch baking pan. Sift flour, baking soda, baking powder, and salt onto wax paper. Boil raisins rapidly in the 2 cups water in an uncovered medium-size saucepan for 10 minutes. Transfer raisins and their liquid to a large bowl. Cool to lukewarm. Stir in egg; then shortening and sugar; then flour mixture; add nuts. Turn into prepared pan.
Bake in a preheated oven for 25 minutes or until wooden toothpick inserted in center comes out clean. Cool completely in pan on wire rack. Frost with orange frosting, cut into squares.
Frosting directions: Combine all ingredients in a bowl and whisk until well blended. Drizzle over raisin bars.