Ina's Chocolate Buttercream Frosting

Ina Garten of Food Network's Barefoot Contessa is one of my favorite chefs.  I was watching her show where she prepared a 30th wedding anniversary meal for Jeffrey.  She made the most awesome little chocolate wedding cake, it was so cute!  The buttercream frosting she made included many ingredients that I have not used in a chocolate frosting, so I wanted to make sure that I didn't lose the recipe.

For the complete meal from this episode, click here.  It is all good!

Ingredients

• 1 pound bittersweet chocolate
• 12 ounces semisweet chocolate
• 3/4 cup egg whites (4 to 5 extra-large eggs), at room temperature
• 1 1/2 cups granulated sugar
• 1/4 teaspoon cream of tartar
• 3/4 teaspoon kosher salt
• 1 1/2 pounds unsalted butter, at room temperature
• 3 teaspoons pure vanilla extract
• 3 teaspoons instant espresso powder, dissolved in 1 1/2 teaspoons water
• 3 tablespoons dark rum, optional

Directions

Chop the chocolates and place them in a heat-proof bowl set over a pan simmering water. Stir until melted and set aside until cooled to room temperature.

Mix the egg whites, sugar, cream of tartar, and salt in the bowl of an electric mixer fitted with a whisk attachment. Place the bowl of egg whites over the pan of simmering water and heat the egg whites until they are warm to the touch, about 5 minutes. Return the bowl to the electric mixer and whisk on high speed for 5 minutes, or until the meringue is cool and holds a stiff peak.

Add the butter, 1 tablespoon at a time, while beating on medium speed. Scrape down the bowl, add the melted chocolate, vanilla, espresso, and rum, if using, and mix for 1 minute or until the chocolate is completely blended in. If the buttercream seems very soft, allow it to cool, and beat it again.