Coca-Cola Cake
["1 c. butter or margarine", "1 c. Coca-Cola", "2 c. sugar", "1/2 c. buttermilk*", "1 tsp. vanilla", "3 Tbsp. powdered cocoa", "2 c. sifted all-purpose flour", "2 eggs", "1 tsp. soda", "1 1/2 c. miniature marshmallows"]
["*To make buttermilk, add 1 tablespoon lemon juice to a cup of milk; let sit for about 15 minutes."]
["butter", "Coca-Cola", "sugar", "buttermilk", "vanilla", "powdered cocoa", "flour", "eggs", "soda", "marshmallows"]