01 -
Set the oven to 300°F to prepare for baking.
02 -
Sift together almond flour and powdered sugar to ensure a fine mixture.
03 -
Whip egg whites until foamy, then gradually incorporate granulated sugar while continuing to whip until stiff peaks form.
04 -
Gently fold the sifted dry ingredients into the meringue to maintain airiness.
05 -
Divide batter into portions and blend in red and green food coloring separately.
06 -
Using a piping bag, form uniform circles on parchment-lined baking sheets.
07 -
Allow piped shells to rest at room temperature for 30 minutes to develop a skin.
08 -
Bake shells in the preheated oven for 15 to 20 minutes until firm.
09 -
Let the baked shells cool completely before assembling.
10 -
Whip unsalted butter, icing sugar, vanilla extract, and salt until smooth and creamy.
11 -
Pipe buttercream onto one shell and sandwich with a matching shell.