Two iconic holiday flavors wrapped up into one "first cookie gone at the cookie swap" recipe. Make gingerbread eggnog sandwich cookies for someone on your Nice List.
Match cookies into pairs and pipe filling onto one cookie, covering with the other. Store in an airtight container up to 3 days at room temperature or a week in the refrigerator.
Filling Notes: If you don't have eggnog on hand, substitute 1 tbsp heavy cream or milk, add a pinch of cinnamon, and a little more nutmeg.
Baking Notes: If you are baking in batches, don't chill the cookie dough or the cookies won't spread properly. Just let the remaining dough rest at room temperature the 10 minutes or so the first batch is baking.