Galloping Good Gingerbread Cookies

Ingredients

• 3 1/4 cups (400g) all-purpose flour
• 1 tablespoon ground ginger
• 1 tablespoon ground cinnamon
• 1 teaspoon ground nutmeg
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup (115g) unsalted butter, softened
• 3/4 cup (150g) brown sugar, packed
• 1 large egg
• 1/2 cup (120ml) unsulfured molasses
• Royal icing (made with 2 egg whites and 4 cups powdered sugar)
• Assorted sprinkles and edible decorations