Lake Francis Sheet Cake
["1 c. butter (2 sticks)", "1/3 c. cocoa", "2 c. flour", "1 tsp. soda", "2 eggs", "1 c. nuts (optional)", "1 c. water", "2 c. sugar", "1 tsp. salt", "1 c. sour cream", "1 tsp. vanilla"]
["In large saucepan, melt butter.", "Add water, cocoa and sugar. Bring to a boil.", "Stir with wire whisk until well blended.", "Remove from heat.", "Add remaining ingredients, one at a time, and mix well."]
["butter", "cocoa", "flour", "soda", "eggs", "nuts", "water", "sugar", "salt", "sour cream", "vanilla"]