01 -
Sift the powdered sugar and almond flour together a few times until everything's super smooth. Leave it for later.
02 -
Beat the egg whites until soft peaks appear. Slowly sprinkle in the granulated sugar, then beat until stiff peaks hold their shape. Add coloring if you'd like.
03 -
Add the dry sifted ingredients into the whipped egg whites in two parts. Mix gently with folding motions until the batter smooths out and flows like molten lava. It should settle back on itself in about 10 seconds.
04 -
Pipe small circles (about 1.5 inches) onto baking sheets with parchment or silicone mats. Firmly slam the trays on your counter to pop air bubbles. Leave them out for 30 to 60 minutes until they feel dry when touched.
05 -
Bake in a 300°F oven for 15-18 minutes. Rotate the trays halfway through. They're ready when they develop 'feet' and aren't wiggly. Cool completely after baking.
06 -
Cream the butter well, then slowly add the powdered sugar and vanilla extract. Add a splash of milk if it’s too thick to spread easily.
07 -
Pair up shell halves by size. Add the filling on one half and gently press the second one on top. Place in the fridge for 1-2 days to enhance the flavor.