• Preheat oven to 350°
• Grease a 11 x 17 jelly roll pan (can also use a 9x13 pan, but you may die of sugar shock-there's something to be said for spreading the love in this recipe).
• Combine butter and shortening, 2 oz. chocolate and water in a small saucepan. Heat until chocolate is melted.
• In a separate small bowl, combine flour and baking soda. Set aside.
• In a large mixing bowl, combine sugar, buttermilk, eggs, cinnamon, and vanilla. mix well
• Combine the sugar mixture with the chocolate mixture.
• Add flour mixture and mix very well.
• Pour into pan and bake 20-25 min or until a pick comes out clean.
• Five minutes before cake is done, make frosting

Frosting:

• Combine milk, chocolate and butter in a large (or medium-large) saucepan. Heat until bubbles form around the edge
• Remove from heat and add powdered sugar and vanilla and beat until smooth.
• If desired, add 1 cup nuts (optional)
• While icing is still warm, pour over cake.