Step 1

Preheat oven to 350°F (180°C).

Step 2

Beat butter with sugar until very light and fluffy. Beat in sour cream, egg yolk, rum extract and nutmeg until well combined. Stir flour with baking soda and salt in a separate bowl. Gradually blend into butter mixture on low speed.

Step 3

Transfer dough to a cookie press. Press the dough onto ungreased, baking sheets. Decorate as desired.

Step 4

Bake, in batches, for 6 to 8 minutes or until just pale golden on bottom. Cool for 5 minutes on the baking sheet; transfer to a rack to cool completely.