Caramel Buttercream For Chocolate Caramel Layer Cake Recipes

Steps:

• Make caramel: Pour 1/4 cup water into a medium heavy-bottom saucepan. Add 1/2 cup plus 2 tablespoons sugar. Cook over medium-high heat, stirring occasionally, until sugar is dissolved and syrup is clear. Continue to cook, without stirring, until syrup comes to a boil, washing down sides of pan with a wet pastry brush 2 or 3 times to prevent crystals from forming. Let syrup boil, gently swirling pan occasionally, until syrup is dark amber.
• Immediately remove from heat; carefully pour in cream (caramel will bubble vigorously). Stir caramel until smooth. Transfer to a bowl; let cool.
• Whisk together remaining 1/2 cup plus 2 tablespoons sugar, the egg whites, and salt in the heatproof bowl of a standing mixer. Set bowl over a pan of simmering water; whisk until sugar is dissolved and mixture registers 140 degrees on an instant-read thermometer.
• Return bowl to mixer; fit mixer with whisk attachment. Beat on medium-high speed until stiff. Reduce speed to medium low; add butter, a few tablespoons at a time. Continue whisking until smooth.
• Switch to paddle attachment. Add caramel and vanilla; beat on lowest speed until combined, 3 to 5 minutes. The buttercream can be made 2 days ahead and stored in the refrigerator. Before using, bring frosting to room temperature; return to mixer and beat with the paddle attachment until smooth.

Steps:

• Preheat oven to 350 degrees. Butter a 12-by-17-inch rimmed baking sheet, and line with parchment paper. Butter lining. Dust bottom and sides with flour; tap out excess.
• Whisk together flour, baking soda, and salt in a medium bowl; set aside. Whisk together chocolate, coffee, and boiling water in a separate bowl; set aside.
• Put butter and sugar in the bowl of an electric mixer fitted with the paddle attachment; beat on medium-high speed until pale and fluffy. Add sour cream; beat until smooth. Beat in eggs, one at a time, scraping down sides of bowl. Reduce speed to low; beat in flour mixture.
• Whisk chocolate mixture again; add to batter. Beat until smooth.
• Pour batter into prepared sheet. Bake until a cake tester inserted into center comes out clean, 20 to 25 minutes. Let cool completely in sheet on a wire rack.
• Invert cake onto a rimless baking sheet; peel off parchment. Halve widthwise. Spread half of buttercream on top of one layer. Top frosted layer with second cake layer; coat cake with remaining frosting. Refrigerate 1 hour. Cut into 12 squares; garnish each serving with a caramelized cobweb.