16 tablespoons unsalted butter cut into pieces and softened to room temperature
Supplies you will need
Double boiler (or a makeshift double boiler)
Candy thermometer or instant-read thermometer
Hand Whisk
Whisk attachment for a stand-mixer
Instructions
First create a champagne reduction by placing the champagne in a medium-sized saucepan over high heat. Bring to a bowl then reduce the temperature to medium-low. Let the champagne simmer until it’s reduced to about a ¼ cup. It will turn a dark amber shade. Once reduced, remove from heat and let cool to room temperature before using to make the buttercream.
In the bowl of a stand mixer (or the top bowl fo a double-boiler, if using) gently whisk together the egg whites, sugar and salt. Place the bowl over the double boiler and whisk the mixture continuously until the thermometer registers 160F. Remove from heat.
Using a stand-mixer, beat the heated egg whites on high until stiff peaks form and the mixture has cooled to room temperature (8-10 minutes).
Reduce the speed to medium and begin adding the butter pieces, 1 tablespoon at a time, only adding more after each is fully incorporated.
If the mixture looks like it has curdled or broke, continue to whisk on high until it comes back together.
Once all the butter has been incorporated, slowly drizzle in the cooled champagne reduction (very slowly!) and continue to whip until the mixture comes together creating a silky buttercream.
To make the pink champagne macarons, sandwich 1-2 teaspoons of buttercream between two macaroon shells. Store assembled macarons at in the refrigerator for 3-5 days.
Recipe by Her Modern Kitchen at https://www.hermodernkitchen.com/baking-bucket-list-pink-champagne-macarons/