Moist Chewy Chocolate Cake
["2 c. flour", "2 c. sugar", "1 stick butter", "1/2 c. shortening", "4 Tbsp. cocoa", "1 c. water", "1/2 c. buttermilk", "1 tsp. soda", "2 eggs", "1 tsp. vanilla"]
["Note:", "Buttermilk can be replaced with 1/2 cup whole milk mixed with 1 tablespoon vinegar."]
["flour", "sugar", "butter", "shortening", "cocoa", "water", "buttermilk", "soda", "eggs", "vanilla"]