If you love cinnamon, this dessert is made for you. If you're a fan of ginger, these cookies will quickly become your favorites. Gingerbread cookies are truly irresistible—not just at Christmas!
Work the butter (cut into pieces) with the brown sugar, molasses, and egg until light and fluffy.
Gradually add the flour, then the spices, baking soda, leavening powder, and salt. Use your hands to knead everything together.
Divide the dough into two balls, wrap each in cling film, and refrigerate for at least 2 hours.
After chilling, roll out each dough ball to about 5 mm thickness. Cut into shapes with cookie cutters.
Place cookies on a baking tray and bake at 180°C (350°F) for 8–10 minutes—or up to 12 minutes if you want them crispier.
To prepare the royal icing, beat the egg whites with an electric mixer until stiff and frothy. Gradually add the icing sugar, then the cream of tartar. Add food coloring if desired for a more vibrant touch.
Transfer the icing to a piping bag and decorate your gingerbread cookies as you like.