1. Add the butter and sugars to a large bowl and mix until light and fluffy. Add the egg yolk and mix until well combined. Add the Eierlikör and rum and mix in well. Mix the flour with baking powder, ground cinnamon, ground nutmeg, and salt. Add to the bowl and mix until just combined. Place the dough in the fridge for at least one hour to cool down.

 

2. Preheat the oven to 350°F (180°C). Line a baking sheet with baking parchment and set aside. Use a cookie scoop or two tablespoons to place dough portions on the baking sheet – leave some space in between and bake for 9-10 minutes. The cookies should have a light golden color only. Take out of the oven and let cool down a bit on the baking sheet, then transfer to a wire rack and let cool down completely.

 

3. For the glaze mix the confectioners’ sugar with the Eierlikör until smooth. Gradually add the rum until you get a nice and thick glaze – you might not need all of the rum. Drizzle over the cookies and let dry. Sprinkle with nutmeg if you like (optional).