01 -
Preheat oven to 150°C. Line two baking trays with parchment paper and set aside.
02 -
Place egg whites and granulated sugar in a bowl over a saucepan of simmering water. Whisk constantly until sugar dissolves and mixture is frothy, about 1 to 1.5 minutes.
03 -
Remove bowl from heat and attach to stand mixer. Whip on high speed for 2–3 minutes until stiff peaks form.
04 -
Sift almond flour, cocoa powder, and powdered sugar together.
05 -
Add sifted dry ingredients to whipped egg whites. Mix lightly on medium speed for 10 seconds, then fold gently with a spatula until batter flows slowly in a 'figure eight' pattern.
06 -
Transfer batter to a pastry bag fitted with a 2.5 cm round tip. Pipe 4 cm rounds onto trays spaced 4 cm apart. Tap trays twice to release air bubbles.
07 -
Bake for 13 minutes, rotating trays halfway through. Cool completely before removing shells from parchment.
08 -
Beat peanut butter and softened butter until smooth. Gradually add powdered sugar, vanilla, and salt. Whip until fluffy.
09 -
Pipe filling onto half of the shells using a star tip. Gently sandwich with remaining shells. Decorate with melted chocolate or chopped peanuts if desired.