Orange Crinkle Cookies

Wash the orange, scrub it with a brush, and pour boiling water over it 3 times to remove wax and chemicals. Grate the orange part of the peel on a fine grater.

Sift the flour with cocoa, baking powder, and 70 g of powdered sugar. Add one beaten egg, butter, orange flakes or zest, and liqueur or juice. Work into a very sticky dough. Wrap it in cling film and let it chill in the refrigerator for 2 hours.

Divide the chilled dough into 25 portions, form them into balls, and immediately coat them in a thick layer of sifted powdered sugar. Place the balls on a baking sheet lined with parchment paper, leaving plenty of space between them, as they will expand significantly during baking.