Of course you can always buy the yellow-coloured syrup with the artificial rum flavour that passes for egg nog in the grocery store. But home made tastes better and takes less than five minutes to make.
1 level tablespoon white sugar
¼ cup table cream (10%)*
½ cup milk
Combine the first four ingredients in your Magic Bullet or blender and zap for a few seconds until foamy. Add nutmeg and your poison of choice (rum or brandy are traditional but almost anything works) and there you are. Merry Christmas!
*You can just use milk if you like but the texture won’t be as rich.