Sauerkraut Surprise Cake
["1/2 c. butter", "1 1/2 c. sugar", "3 eggs", "2 tsp. vanilla", "2 c. flour", "1 tsp. baking powder", "1 tsp. baking soda", "1/4 tsp. salt", "1/2 c. cocoa powder", "1 c. water", "1 c. drained sauerkraut"]
["In large bowl, cream butter and sugar until light.", "Beat in eggs; add vanilla.", "Sift together flour, baking powder, soda, salt and cocoa powder.", "Add to cream mixture, alternating with water. Stir in sauerkraut.", "Pour into a floured 13 x 9 x 2-inch pan."]
["butter", "sugar", "eggs", "vanilla", "flour", "baking powder", "baking soda", "salt", "cocoa powder", "water", "sauerkraut"]