Idaho Spud Cake

Preheat oven to 350 °F (175°C) . Grease and flour a 13 x 9 x 2-inch baking pan; set aside.

In a medium bowl, whisk together the flour, cocoa, baking soda and salt; set aside.

In a large mixing bowl using an electric mixer, cream butter and sugar until light and fluffy. Add eggs, mashed potatoes and vanilla and continue beating until well mixed. With mixer at low speed, add flour mixture alternately with the milk. Stir in nuts.

Pour cake batter into prepared baking pan.

Bake for 35 to 45 minutes or until cake tests done when wooden pick inserted near center comes out clean. Cool cake completely on wire rack. Frost as desired.