Whisk allulose and egg yolks with a stand or hand mixer until light and creamy.
4 large egg yolks, 1/2 cup granulated allulose
In a medium saucepan add milk, cream, nutmeg, salt, vanilla, and vanilla pudding mix. Stir often until mixture reaches a bare simmer.
3 cups whole milk, 2 cups heavy whipping cream, 1/2 tsp ground nutmeg, Pinch of salt, 1/4 tsp vanilla extract, 1 box Simply Desserts Vanilla Pudding
Add a big spoonful of the hot milk to the egg mixture, whisking vigorously. Repeat, adding a big spoonful at a time, to temper the eggs.
Once most of the hot milk has been added to the eggs, pour the mixture back into the saucepan on the stove. Whisk constantly for just a few minutes, until the mixture is just slightly thickened.
Pour the eggnog into a pitcher or other container and cover with plastic wrap.
Refrigerate until chilled. It will thicken as it cools. If you want a thinner, completely smooth consistency, you can add the entire mixture to a blender with 1 or 2 tablespoons of milk and blend until smooth.
Serve with a sprinkle of cinnamon, and fresh whipped cream. Add your favorite rum, brandy or bourbon upon serving if desired. Store in fridge.
Optional: rum, brandy, or bourbon, sprikle of cinnamon