Chocolate Stout Cake

Ingredients (13)

• 2 Cups rich stout beer.  I used an oatmeal stout.
• 1 pound (4 sticks) unsalted butter
• 1 1/2 Cups cocoa powder
• 4 Cups all-purpose flour
• 4 Cups sugar
• 1 Tablespoon baking soda
• 1 1/2 Teaspoons salt
• 4 large eggs
• 1 1/3 Cups sour cream
• 1 3 ounce bar chocolate (for optional garnish)
• Frosting:
• 2 Cups heavy cream
• 1 pound bittersweet chocolate