1-First Step: Prep Your Mise en Place Gather all ingredients: 1 cup softened butter, 1/2 cup powdered sugar, 2 tbsp eggnog, 1 tsp rum extract, 2 cups flour, 1/2 cup cornstarch, 1/2 tsp nutmeg, 1/4 tsp salt, and 1 cup powdered sugar for coating. Preheat oven to 350°F. Line two baking sheets with parchment paper. Soften butter at room temp for 30 minutes, not melted. Vegan adapt: use plant butter here.

2-Second Step: Cream the Butter and Sugar Beat 1 cup softened butter with 1/2 cup powdered sugar using a mixer on medium for 2 minutes until light and fluffy. Scrape sides often. This incorporates air for soft cookies. Low-calorie tip: add 1 tbsp more eggnog to compensate for lighter butter.

3-Third Step: Add Wet Ingredients Mix in 2 tbsp eggnog and 1 tsp rum extract on low speed until combined, about 30 seconds. Avoid overmixing to keep dough tender. For alcohol-free, double eggnog to 4 tbsp and add 1 tsp vanilla. Taste dough here if needed; spices shine through.

4-Fourth Step: Incorporate Dry Ingredients Whisk together 2 cups flour, 1/2 cup cornstarch, 1/2 tsp nutmeg, and 1/4 tsp salt in a bowl. Gradually add to wet mixture on low speed, mixing just until dough forms, 1 minute max. Gluten-free: use almond flour blend now. Dough will be soft and slightly sticky.

5-Fifth Step: Chill the Dough Wrap dough in plastic and chill 1 hour. This prevents spreading for perfect meltaway cookies. Busy parents can chill 30 minutes or skip for slightly flatter but still tasty results.

6-Sixth Step: Shape and Bake Scoop 1-inch balls (1 tbsp each) and place 2 inches apart on sheets. Bake 12 minutes until edges firm but centers soft. No browning needed. Cool on sheets 5 minutes, then transfer to rack. Full batch takes 24 minutes baking in rotations.

7-Final Step: Coat and Serve Cool cookies completely, 20 minutes. Roll in 1 cup powdered sugar for snowy look. Double coat for extra melt-in-your-mouth effect. Store as below. Pair with tea for party hosts. These eggnog rum cookies impress at cookie exchanges.