Step 2

Make the macaron shells: Preheat the oven to 285º and line 3 baking sheets with silicone mats. In a large bowl, combine the almond flour, confectioners' sugar, rose water, red food coloring and 3 egg whites. Using a rubber spatula, mix until a smooth paste is formed.

Step 3

In a stand mixer fitted with the whisk attachment, beat the remaining 3 egg whites until foamy. In a small saucepan, heat the granulated sugar and water over medium-high heat until it reaches 234º according to an instant-read thermometer, 2 minutes. With the stand mixer motor running, slowly stream in the syrup. Then increase the speed to medium high and beat the egg mixture until stiff peaks have formed and the meringue is cool to the touch.

Step 4

Fold a third of the meringue into the almond flour mixture until smooth, then continue folding in the remaining meringue, one third at a time. Transfer to a piping bag fitted with a ⅝-inch round pastry tip.

Step 5

Pipe 2-inch shells (about 2 tablespoons per shell) 2 inches apart from one another on the prepared baking sheets. You should end up with 48 shells. Slam the trays on a sturdy work surface to spread the batter and smooth the shells. Let the shells dry at room temperature until a skin has formed and they are no longer tacky to the touch, 30 to 45 minutes.

Step 6

Bake the macarons, rotating the trays halfway through, until they have risen and the shells are matte in appearance, 20 to 25 minutes. Let cool completely before releasing the shells from the trays.

Step 7

Meanwhile, make the Champagne jelly: In a small saucepan, heat the sugar and Champagne over medium-high heat. Bring to a boil and cook until the sugar is dissolved, 1 to 2 minutes. Sprinkle in the pectin and once hydrated (no longer white in appearance), whisk to incorporate. Remove from the heat and let cool completely.

Step 8

Make the rose buttercream: In the bowl of the stand mixer, cream the confectioners' sugar and the butter until light and fluffy, then beat in the remaining ingredients until smooth. Transfer to a piping bag fitted with a ⅜-inch round pastry tip.

Step 9

Pipe a circle of buttercream around the outer edges of half of the macaron shells. Spoon 1 teaspoon of jelly in the center of the buttercream and top each with another shell. Refrigerate for 15 minutes to firm the buttercream, then serve.