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Contest-Winning Chocolate Potato Cake

I won grand champion honors in a potato festival baking contest with this moist chocolate cake. The icing recipe can be doubled for real sweet tooths. A great-grandma, I've spent over 85 years on the farm.
  • Total Time
    Prep: 40 min. Bake: 25 min. + cooling
  • Makes
    12 servings


  • 1 cup butter, softened
  • 2 cups sugar
  • 2 large eggs, room temperature
  • 1 cup cold mashed potatoes (without added milk and butter)
  • 1 teaspoon vanilla extract
  • 2 cups all-purpose flour
  • 1/2 cup baking cocoa
  • 1 teaspoon baking soda
  • 1 cup whole milk
  • 1 cup chopped walnuts or pecans
  • 1/2 cup butter, cubed
  • 1 cup packed brown sugar
  • 1/4 cup evaporated milk
  • 2 cups confectioners' sugar
  • 1/2 teaspoon vanilla extract


  • In a large bowl, cream butter and sugar until light and fluffy. Add 1 egg at a time, beating well after each addition. Add potatoes and vanilla. Combine the flour, cocoa and baking soda; gradually add to creamed mixture alternately with milk, beating well after each addition. Stir in nuts.
  • Pour into 2 greased and floured 9-in. round baking pans. Bake at 350° until a toothpick inserted in the center comes out clean, 25-30 minutes. Cool for 10 minutes before removing from pans to wire racks to cool completely.
  • For icing, in a saucepan over low heat, cook butter and brown sugar until butter is melted and mixture is smooth. Stir in evaporated milk; bring to a boil, stirring constantly. Remove from the heat; cool to room temperature. Stir in confectioners' sugar and vanilla until smooth. Spread between layers and over top of cake.
Nutrition Facts
1 slice: 671 calories, 31g fat (15g saturated fat), 101mg cholesterol, 374mg sodium, 94g carbohydrate (71g sugars, 2g fiber), 8g protein.

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Average Rating:
  • Debra
    Nov 2, 2020

    No comment left

  • patrasor
    Sep 14, 2015

    This is the exact recipe that my grandmother used to make for all of my birthdays when I was a girl in school. I highly recommend this cake and can't think of any changes that would make it better. FIVE STARS PLUS

  • Halfways
    Jan 23, 2013

    A dense , moist light chocolate taste...Very good..I made this into cup cakes..with a chocolate frosting topping. I am making this tomorrow as well for a young women's activity with a chocolate gauche filling and light flavored chocolate frosting..Yumm ~~

  • Wingedratty
    Oct 20, 2011

    Best homemade chocolate cake ever! My picky little siblings adored it (I did not tell them about the potato)! I used raw sugar instead of regular sugar, and rice milk instead of regular milk. Turned out great.

  • t-macka
    May 24, 2009

    No comment left

  • newmomnewcook
    Jun 26, 2006

    No comment left