-I like soy milk best in this recipe, although coconut milk and oat milk are good, too. You could even use a mix of any two milks. If you do use coconut milk, omit the coconut oil in the recipe. Strangely, I find that some commercial almond milks take on an off taste when heated. Not all brands do that though, so if you have one that's tried and true, go ahead and use it. Homemade almond milk, however, always works great.
-If you're using an unsweetened soy milk, go ahead and add an extra teaspoon of sugar to the recipe to achieve the same level of sweetness. Keep in mind the sweetness of the chocolate. Some dark chocolates contain a lot of sugar so you may not even need to add any additional sugar at all.
-Garnish your hot chocolate with steamed and frothed soy milk, whipped coconut cream, shaved chocolate, or a dusting of cocoa powder.