01 - Sift icing sugar into a large mixing bowl to remove lumps.
02 - Add egg white or aquafaba and peppermint extract to the icing sugar, mixing with a wooden spoon until a stiff, smooth paste forms.
03 - Dust a clean work surface lightly with icing sugar, then turn out the paste and knead gently until smooth.
04 - Roll the mixture to approximately 1/2 inch thickness.
05 - Use a small round cutter about 1 1/4 inch in diameter to cut circles, placing them on a baking tray lined with parchment paper.
06 - Allow to dry at room temperature for at least 1 hour or until firm to the touch.
07 - Dip half of each cream into melted dark chocolate, then return to the tray to set.