Found as a giffy recipe via Reddit, original recipe at https://gfycat.com/madeuptestychrysomelid.
Ingredients
2 large eggs
3oz (85g) superfine sugar (he used same stuff I use, C&H in what looks like milk cartons)
6 oz (180ml) whole milk
4 oz (120 ml) heavy whipping cream
2 oz (60ml) spiced rum (he used Alander)
2 oz (60ml) brandy
1/2 tsp freshly grated nutmeg
Instructions
Add eggs to a blender and blend at low speed until well blended. Through hole at top while machine is running add supefine sugar, milk, whipping cream, spiced rum, brandy, and nutmeg. Transfer to pitcher and store in refrigerator. Serve in a chilled glass garnished with more nutmeg.