This is MY birthday cake! For as far back as I can remember my mama made this cake for me on my birthday. I believe I was born with the chocolate addiction gene. Strange though cause my mother did NOT have the chocolate gene, the only chocolate she liked was tootsie rolls. But I could have eaten this cake every day of my life. Mama's been gone 36 years and still today when i taste this cake I think of mama.
Preheat oven to 350. Grease and flour three (9inch) round baking pans.
Cream butter and sugar. Add eggs ones at a time. Beat till light and fluffy. Blend in vanilla.
Combine dry ingredients and add alternately with sour cream. Stir in water till blended.
Pour into pans and bake for 35 minutes at 350 or until done. Cool in pan for 10 minutes. Remove to wire racks and cool completely then frost.
Frosting: In medium saucepan, melt butter and chocolate over low heat. Cool several minutes. In mixing bowl combine powdered sugar, sour cream, and vanilla and mix till smooth. Turn mixer on high and whip till nice and spreadable. Frost cooled cake.