Mashed Potato Chocolate Cake - cooking recipe

Ingredients

1 cup mashed potatoes, hot and unseasoned
1 cup water, lukewarm
2 cups all-purpose flour, sifted
3/4 cup unsweetened Dutch-processed cocoa powder
2 teaspoons instant coffee granules (optional)
1/2 teaspoon baking soda
1 pinch salt
1 cup miniature semisweet chocolate chips (optional)
2/3 cup unsalted butter, softened
2 cups granulated sugar
1 teaspoon vanilla
4 large eggs

Preparation

Preheat oven to 350 degrees. Grease and flour a 13 by 9 inch baking pan.
Place mashed potatoes into medium bowl. With a whisk, gradually stir in water to form a smooth mixture, do not beat mixture excessively. Cool to lukewarm.
Sift flour, cocoa powder, coffee granules, baking soda and salt. Place chocolate chips in small bowl with about 1 Tablespoon of the sifted dry ingredients and stir well until chips are coated. Set aside.
In a large bowl, combine butter, sugar and vanilla. Beat 2 minutes at medium speed. Add eggs, 2 at a time, beating in at a low speed until blended. Increase mixer speed to medium; beat 1 minute.
At lowest speed, add sifted dry ingredients in 3 additions and mashed potato-water mixture in two additions, beginning and ending with dry ingredients and beating after each addition just until blended. Batter may still appear curdled after all ingredients have ben added -- this is okay. Remove bowl from mixer.
Fold in chocolate chips.
Turn batter in prepared pan. Bake 27 to 32 minutes. Sift confectioners' sugar over top just before serving.