Whisk the egg yolks in a stand mixer until they start to lighten in color. Add in heavy cream, unsweetened almond milk, alcohol (if using), vanilla extract, ground cinnamon and ground nutmeg. Beat a few times to combine the ingredients.

Test for sweetness, adding a little of the liquid sweetener at a time, stirring, then taste testing.

In a separate bowl, whisk the egg whites until soft peaks form. Carefully fold the egg whites into the egg yolk mixture.

Transfer it to a jug, cover, and leave in the fridge overnight.

When you're ready to serve, stir well, then divide the recipe between glasses. Sprinkle a little ground cinnamon over the drink and enjoy!