Whole Egg Lemon Buttercream Recipes

WHOLE-EGG LEMON BUTTERCREAM

Steps:

• Bring 1 cup water to just below a simmer in a medium saucepan over medium-low heat. Using a handheld whisk, combine eggs, sugar, and salt in the bowl of a stand mixer. Place bowl on top of saucepan (it should not touch water) and cook egg mixture, whisking constantly, until lightened in color, thickened slightly, and an instant-read thermometer registers 160°F. Remove from heat and beat with stand mixer fitted with the whisk attachment on medium speed until completely cooled and tripled in volume, about 10 minutes. Add butter, 1-2 Tbsp. at a time, beating well after each addition until fully incorporated. Add vanilla and lemon curd and beat on medium-low speed until just combined.
• Do Ahead
• Buttercream can be made and refrigerated up to 5 days in advance or frozen up to 1 month. To use refrigerated buttercream, let sit at room temperature until soft, at least 2 hours. Beat with stand mixer fitted with the paddle attachment on medium speed until smooth. If texture is not smooth, beat in a little water, 1 tsp. at a time. To defrost, transfer buttercream from freezer to refrigerator to thaw overnight. Then follow the instructions for using refrigerated buttercream.

ROSEMARY OLIVE OIL CAKE WITH LEMON BUTTERCREAM

Steps:

• Make the cake: Preheat the oven to 300˚ F. Coat two 8-inch round cake pans with cooking spray. Combine the sugar, 2 1/3 cups flour, the baking powder, salt and 2 egg yolks in a large bowl; beat with a mixer on medium-high speed until well mixed. Stream in 1 cup olive oil and mix about 30 seconds. Beat in the 3 whole eggs, one at a time. Stream in the milk and vanilla and mix until combined.
• In a separate bowl, combine the chopped rosemary, remaining 2 teaspoons olive oil and 3 teaspoons flour. Fold the rosemary mixture into the batter.
• Pour the batter into the cake pans. Bake until a toothpick inserted into the centers comes out clean, 20 to 30 minutes. Transfer to a rack and let cool completely in the pans.
• Make the lemon curd: In a small saucepan, combine 1/4 cup sugar, the egg yolk, lemon zest and juice, cornstarch and 1 tablespoon butter. Stir continuously with a rubber spatula until the mixture boils and thickens, about 1 minute. Transfer the lemon curd to a bowl and place a piece of plastic wrap directly on the surface to prevent a skin from forming. Refrigerate to cool.
• Make the buttercream: Set up a stand mixer with the whisk attachment. In a medium saucepan, heat the egg whites and remaining 1 cup sugar over medium heat until the mixture reaches 160˚ F and the sugar is dissolved. (You should not be able to feel any sugar granules and the mixture should be very warm, not hot, to the touch.)
• Pour the egg white mixture into the mixer bowl and whisk on medium-high speed until the meringue is three times its volume, holds firm peaks and has cooled to about 95˚ F, about 4 minutes. Beat in the remaining 4 sticks butter slowly, piece by piece, until smooth and blended. Beat in the salt and vanilla.
• Remove the lemon curd from the refrigerator and fold it into the buttercream until well combined.
• Assemble the cake: Transfer 1 cake layer to a cake plate. Spread some of the buttercream on top using an offset spatula. Top with the other cake layer. Cover the top and sides of the cake with a thin layer of buttercream (this is the crumb coat); refrigerate 15 to 20 minutes. Cover with the remaining buttercream.

WHOLE-EGG MOLASSES BUTTERCREAM

Steps:

• Bring 1 cup water to just below a simmer in a medium saucepan over medium-low heat. Using a handheld whisk, combine eggs, sugar, and salt in the bowl of a stand mixer. Place bowl on top of saucepan (it should not touch water) and cook egg mixture, whisking constantly, until lightened in color, thickened slightly, and an instant-read thermometer registers 160°F. Remove from heat and beat with stand mixer fitted with the whisk attachment on medium speed until completely cooled and tripled in volume, about 10 minutes. Add butter, 1-2 Tbsp. at a time, beating well after each addition until fully incorporated. Add vanilla and molasses and beat on medium-low speed until just combined.
• Do Ahead
• Buttercream can be made and refrigerated up to 5 days in advance or frozen up to 1 month. To use refrigerated buttercream, let sit at room temperature until soft, at least 2 hours. Beat with stand mixer fitted with the paddle attachment on medium speed until smooth. If texture is not smooth, beat in a little water, 1 tsp. at a time. To defrost, transfer buttercream from freezer to refrigerator to thaw overnight. Then follow the instructions for using refrigerated buttercream.