Combine flour, baking soda, and salt in medium bowl. Combine butter, granulated sugar and brown sugar in large mixer bowl; beat until creamy. Add egg, pumpkin, orange juice and orange peel. Beat until combined. Gradually add flour mixture; beat until combined. Stir in nuts or raisins.
Drop dough by rounded Tbsp. onto ungreased baking sheets.
Bake in preheated 375°F. oven, for 12-14 minutes. Remove to wire racks to cool completely. Spread each cookie with about 1/2 tsp. of the glaze. (optional to glaze)
Combine 1 1/2 cups sifted powdered sugar, 2-3 Tbsp. orange juice, and 1/2 tsp. grated orange peel in medium bowl until smooth.