Buttermilk Brownies
["2 c. sugar", "2 c. flour", "3 Tbsp. cocoa", "1 c. cold water", "1/2 c. butter", "1/2 c. oil", "2 eggs", "1/2 c. buttermilk", "1 tsp. baking soda", "nuts (optional)", "3 Tbsp. cocoa", "1/3 c. buttermilk", "1/2 c. butter", "1 tsp. vanilla", "1 lb. powdered sugar, sifted"]
["Preheat oven to 325\u00b0.", "Grease and flour a 13 x 9 x 2-inch baking pan.", "Mix together sugar and flour.", "Boil cocoa, water, butter and oil; mix in flour and sugar.", "Add eggs.", "Stir baking soda into buttermilk.", "Add to batter, along with nuts (if desired).", "Bake for 20 to 25 minutes.", "Frost while hot."]
["sugar", "flour", "cocoa", "cold water", "butter", "oil", "eggs", "buttermilk", "baking soda", "nuts", "cocoa", "buttermilk", "butter", "vanilla", "powdered sugar"]