A rich and sweet chocolate cake recipe from our July 1985 “Great New England Cook” Deedy Marble from Ludlow, Vermont.
Preheat the oven to 350 degrees and grease and flour a 10-inch tube pan. Pour boiling water over chocolate and butter and let stand until melted. Stir in vanilla and sugar; whisk in egg yolks. Mix the sour cream with the baking soda and add to the chocolate mixture. Add flour and mix well. Beat egg whites until stiff and fold into the batter. Pour into pan and bake for 50 minutes, or until tester comes out clean. Cool and unmold. Frost when completely cooled.
Place ingredients in a heavy saucepan over low flame. Whisk until smooth. Cool before applying to cake.