½ cup
aged rum (such as Rhum Barbancourt or Flor de Caña)
¼ teaspoon
freshly grated nutmeg, plus more for garnish
Method
In a large, deep mixing bowl, add the eggs and sugar. Use an immersion blender to blend the eggs and sugar until well combined and sugar is mostly dissolved, about 1 minute. Alternatively, you can use a high-powered blender like a Vitamix. Blend on LOW for 1 minute.
With the immersion blender still running, slowly pour in the heavy cream and blend for 2-3 minutes, until a frothy layer has formed. If using a blender, keep the blender running on LOW while adding the heavy cream and blend for 1-2 minutes until a frothy layer has formed.
Pour in the milk, bourbon, rum, and nutmeg. Blend again for 1-2 minutes until the eggnog is frothy.
Pour the eggnog into a large, airtight container and store in the fridge until chilled through—overnight is best.
The eggnog will separate as it chills. Before serving, use a rubber spatula to fold in the frothy top. Serve topped with a generous dusting of nutmeg. Store refrigerated in an airtight container for up to one week.