3 c Flour
1/2 c Unsweetened cocoa powder
2 ts Ground cinnamon
1 ts Baking soda
1/4 ts Salt
2 c Granulated sugar
3/4 c Brown sugar packed
1 1/2 c Butter; at room temperature
1 c Mashed cooked potatoes (1
-potato) leftover or freshly
-mashed
1 c Sour cream
1/2 c Double strength coffee
1 ts Vanilla
5 Eggs
Confectioners' sugar; for
-garnish