First, gather all your ingredients and prepare them in the right amounts. That makes it so much easier and more fun and you're less likely to forget anything :)
Combine espresso, coconut sugar, cacao powder, vanilla, salt and oat milk in a big vessel and stir well to dissolve the sugar and cacao powder. The espresso needs to be hot for that.
Add oat cream and whiskey and stir again. Fill it into a bottle that has a lid. Then it's best to leave it in the fridge for a few hours or over night, for taste and texture to fully develop.
Taste and add a little more sugar if you'd like it sweeter or more oat milk if the Baileys is too thick.
Keep the Baileys in the fridge and serve on ice or add to your coffee. Give the bottle a light shake before using. The Baileys should keep for at least two weeks.