1. Grease three 8x1-1/2-inch round cake pans. Line bottoms of pans with parchment paper. Grease and flour parchment paper and sides of pan then set aside. In a bowl stir together flour, cocoa powder, baking soda, baking powder, and 1/2 teaspoon salt; set aside.
2. Preheat oven to 350 degrees F. In large bowl beat butter with electric mixer on medium to high for 30 seconds. Gradually add sugar, 1/4 cup at a time, beating on medium until well combined, scraping down the sides of the bowl: beat 2 minutes more. Add eggs one at a time, beating after each addition. Beat in vanilla. Alternately add flour mixture and milk to butter mixture, beating on low after each addition just until combined. Beat on medium to high 20 seconds more. Stir in grated chocolate. Divide batter among prepared pans. (If you do not have three pans, refrigerate remaining batter until ready to use.)
3. Bake 30 to 35 minutes or until a wooden toothpick inserted near centers comes out clean. Cool cakes in pans on wire racks 10 minutes. Remove layers from pans. Cool thoroughly on wire racks.
4. Frost with desired frosting. Store, covered, in refrigerator. Makes 16 servings.
Chocolate Cream Cheese Frosting: In large mixing bowl beat 1/2 cup butter, softened and 2, 3-ounce packages cream cheese, softened. Add 5 ounces unsweetened chocolate, melted and cooled and 2 teaspoons vanilla; beat until blended. Gradually beat in 3 cups powdered sugar and the 1/4 cup milk. Beat in remaining 3-1/2 cups powdered sugar to make a spreading consistency. Makes 4 cups.
Vanilla Sour Cream Frosting: In large mixing bowl combine 3/4 cup butter, softened and 3/4 cup sour cream, and 1-1/2 teaspoon vanilla. Beat with electric mixer on medium for 30 seconds. Gradually beat in 8 cups powdered sugar. Thin with buttermilk or milk to desired consistency. Makes about 4-1/2 cups.
All the recipes here have either been sent to me, adapted by me or found on the web. If I know the source I always give credit to the author/website. If you know of a source I may have missed please let me know.