Chocolate Cake
["1/2 c. butter", "2 c. flour", "2 eggs, well beaten", "1 heaping tsp. soda", "2 1/2 c. flour, sifted", "2/3 c. cocoa, dissolved in 1/2 c. boiling water", "1 tsp. vanilla", "1/4 tsp. salt", "1 c. buttermilk (or add 1 tsp. vinegar to 1 c. sour milk)"]
["Bake at 350\u00b0 for 30 to 35 minutes."]
["butter", "flour", "eggs", "soda", "flour", "cocoa", "vanilla", "salt", "buttermilk"]