Dacquoise Cake w/ coffee buttercream

By wmedders

Ingredients

• Ingredients
• Makes two 12-inch layers
• 1 1/2 cups confectioners' sugar, plus more for dusting
• 1/3 cup Dutch-process cocoa powder
• 6 large egg whites
• 1/8 teaspoon cream of tartar
• 3/4 cup granulated sugar
• Ingredients Frosting
• Makes 4 cups
• 1 1/2 tablespoons instant espresso powder
• 2 tablespoons hot water
• 5 large egg whites
• 1 1/4 cups sugar
• 1 pound (4 sticks) unsalted butter, cut into pieces, room temperature
• Directions
• 1 .In a small bowl, dissolve espresso powder in 2 tablespoons hot water; set aside. In the heatproof bowl of an electric mixer, combine egg whites and sugar. Set the bowl over a pan of simmering water.
• 2 .Transfer mixture to the bowl of an electric mixer fitted with the whisk attachment, mix on low speed, gradually increasing to high speed, until stiff, glossy peaks form, about 10 minutes.
• 3 .With machine running on low speed, add butter to the egg whites, beating until smooth. Add the espresso mixture, and continue beating until incorporated.

Preparation

Step 1

Directions
1.Preheat oven to 250 degrees. Line 2 baking sheets with parchment paper. Using a marker, trace 12-inch circles on each sheet of parchment; turn paper marked side down. In a large bowl, sift together, confectioners' sugar and cocoa powder; set aside.
2.In the bowl of an electric mixer fitted with the whisk attachment, beat egg whites on medium speed until foamy. Add the cream of tartar and a tablespoon of the granulated sugar; beat until soft peaks form. With mixer running, gradually add the remaining 11 tablespoons granulated sugar, beating until stiff glossy peaks form. Fold 1/3 of the egg whites into the confectioners' sugar and cocoa mixture, then fold in remaining whites.
3.Transfer meringue to a large pastry bag fitted with a large plain tip. Starting just within the marked circles, pipe meringue, working inward in a spiral pattern. Bake for 2 hours. Turn off oven allowing meringues to dry out until oven is completely cool, at least 4 hours and up to overnight.