Double Chocolate Potato Drops

Preparation

1. Make the cookies

   Step 1

   Preheat the oven to 375°F.

   Step 2

   In a large bowl, cream together the butter and brown sugar until fluffy. Beat in the egg and vanilla.

   Step 3

   Beat in the mashed potato—ensuring it is cool—and the melted unsweetened chocolate.

   Step 4

   In a separate bowl, combine the flour, salt, and baking soda. Add to the creamed mixture alternately with the buttermilk.

   Step 5

   Fold in the chopped walnuts.

   Step 6

   Drop by teaspoon or small cookie scoop onto a parchment-lined or greased baking sheet. Bake for 12 to 15 minutes. Let them remain on the baking sheet once removed from the oven.

2. Make the icing

   Step 7

   In a double boiler, or in a small saucepan over low heat, melt the butter and chocolate.

   Step 8

   Remove from the heat, and slowly begin whisking in the powdered sugar alternately with the hot water. Whisk smooth.

   Step 9

   Frost cookies by inverting them into the icing, shimmying, and then removing gently. Transfer to a wire rack to cool completely. Periodically, the icing may need to be whisked to prevent early hardening.