chocolate potato cake

Ingredients

• 2 cups flour
• 1/2 cup cocoa
• 2 tsp baking powder
• 1/2 tsp salt
• 2 tsp cinnamon
• 1 cup shorteing
• 2 cups sugar
• 4 eggs
• 1 cup mashed potatoes
• 1 tsp vanilla
• 1/3 cup milk
• 1 cup chopped walnuts