c("In a large bowl, beat eggs until fluffy.", "Add sugar gradually, beating until mixture is thick and lemon-colored.", "Beat in vanilla and butter.", "Combine flour, cocoa, baking powder, soda and salt; add alternately with buttermilk.", "Beat until smooth.", "Fold in zucchini and walnuts.", "Divide batter into four greased and floured 8 or 9-in. round pans.", "Bake at 350 degrees Fahrenheit for 25 to 30 minutes or until top springs back when gently pressed.", "Cool in pans 10 minutes; remove to wire wracks and cool completely.", 
"For frosting, beat all ingredients in a large bowl until creamy.", "Frost between layers and on sides and top of cake.")