Combine the dry ingredients in a large bowl. Sift until fully combined and free of lumps.

Whip the egg whites and sugar to stiff peaks.

Combine the two mixtures and macaronage until it reaches the correct texture.

Pipe into 1-inch disks and add sprinkles. Let rest for 1 hour. Bake for 15 minutes at 280 degrees (F).

Combine the ingredients for the champagne buttercream.

Pipe your desired amount of buttercream on the inside of one macaron shell. Sandwich another macaron shell on top.

Repeat with remaining macaron shells and enjoy!