Gwen'S Red Earth Cake
["1 tsp. soda", "1 tsp. vinegar", "1 1/2 c. sugar", "1/2 c. shortening", "2 eggs", "2 (1 oz.) bottles red food coloring", "2 tsp. cocoa", "2 1/4 c. sifted cake flour", "1/2 tsp. salt", "1 c. buttermilk", "1 tsp. vanilla"]
["Preheat oven to 350\u00b0.", "Coat two 9-inch cake pans with shortening and flour."]
["soda", "vinegar", "sugar", "shortening", "eggs", "bottles red food coloring", "cocoa", "cake flour", "salt", "buttermilk", "vanilla"]