Created by Fizzybrat on June 23, 2019
Step 1: Preheat oven to 375 degrees F.
Step 2: Grease cookie sheets. Set aside.
Step 3: In a medium mixing bowl stir together flour, salt, baking soda, and baking powder. Set aside.
Step 4: In large mixing bowl beat the brown sugar and shortening with an electric mixer on medium speed until well mixed.
Step 5: Add eggs and 1 teaspoon vanilla.
Step 6: Beat until well mixed.
Step 7: Add flour mixture and sour cream alternately to beaten mixture, beating after each addition.
Step 8: Stir in the 2/3 cup nuts.
Step 9: Drop dough by rounded teaspoons 2 inches apart onto prepared cookie sheets.
Step 10: Bake for 10 to 12 minutes or until edges are lightly browned.
Step 11: Transfer to a wire rack and let cool.
Step 12: To make frosting, in a medium saucepan heat and stir butter over medium-low heat until golden brown. (Do not scorch.) Remove from heat. Stir in powdered sugar, boiling water, and 1-1/2 teaspoons vanilla.
Step 13: Beat until frosting is easy to spread.
Step 14: Immediately spread on cooled cookies. (If frosting begins to set up, stir in a small amount of additional boiling water.)
Step 15: If desired, top with additional chopped walnuts or walnut halves.