I can't believe I haven't posted this. I have made it more than once and found easy success. This is a very moist cake (nice change for a cake) but make sure you eat it day of.
1/2 c cocoa
2 c flour
2 1/2 tsp baking powder
1/4 tsp salt
1/2 c butter
3/4 c sugar
3 eggs
1 c cold, unseasoned, mashed potato (I used a dry mix -- and it is the only reason I have a box in my house. Makes it quick for this recipe.)
1/2 c milk
Oven at 350. Butter and flour a 10-inch tube pan (Finally get to use that bunt?) Mix the flour, cocoa, baking powder, and salt in a bowl, set aside. Beat butter and sugar in large bowl, add the eggs one at a time, beating until just blended after each addition. With mixer on low, gradually beat in potato, followed by the dry ingredients, alternating with milk. Spoon into pan, bake about 30-40 minutes (toothpick test). Cool cake in pan, then turn onto rack. SMOTHER with frosting. Here's the recipe they gave, which is a nice compliment to this particular cake:
3 c powdered sugar
1 c butter
1 c cocoa
2/3 c mik
Blend up butter, gradually adding sugar. When it's all in, beat for a bit. Add in cocoa, then slowly add milk. VERY nice.
