Make Oat Milk Hot Chocolate Recipe: creamy dairy-free hot chocolate with dark chocolate and optional coconut cream, ready in 20 minutes.
Finely chop the 2 ounces (60 g) of dark chocolate into small, even pieces so they melt quickly and evenly; place the chopped chocolate in a small matte ceramic square bowl and set it aside on the marble. Keep the same slim stainless whisk with a matte wooden handle and a small glass milk jug nearby for continuity.
In a small ceramic measuring bowl whisk together the sifted unsweetened cocoa powder, 2 tablespoons granulated sugar, and 3–4 tablespoons of the reserved cold oat milk until the mixture becomes a smooth, glossy paste with no dry lumps — the surface should be satin and lump-free, almost syrup-like, ready to disperse into warm milk. Rest the whisk on the rim when finished.

Pour the remaining oat milk into a medium matte steel saucepan (placed on the marble surface, not a stove) and add the cocoa-sugar paste, the pinch of fine sea salt, and the optional 1/8 teaspoon ground cinnamon and chilled full-fat canned coconut milk if using. Gently fold the paste into the cold milk with the same whisk until uniformly integrated; the mixture should look homogenous and slightly darker than plain oat milk.

Bring the assembled mixture to temperature by heating gently (presented here as the finished heated pot on the table): whisk continuously until the surface shows a silky sheen and tiny, delicate bubbles form at the edges — steaming but not boiling, with a smooth, almost creamy skin and faint micro-bubbles. The texture should be cohesive and glossy, evidence it’s nearly ready for the chocolate.

Reduce heat and add the finely chopped dark chocolate to the hot mixture, whisking constantly until every flake melts into a uniformly dark, velvety emulsion; the liquid should thicken slightly and become richly glossy with no graininess, showing a smooth ribbon when lifted with the whisk. If any small unmelted pieces remain, continue slow whisking until fully incorporated.

Carefully taste (it’s hot) and whisk in up to an additional tablespoon of sugar if a sweeter finish is desired; stir until dissolved. Remove from heat, whisk in the 1/2 teaspoon pure vanilla extract, and let the pot rest briefly to reach a comfortable sipping temperature (140–150°F / 60–65°C) while retaining its silky texture.
Divide the hot chocolate evenly into two heatproof matte ceramic mugs, re-whisking briefly if needed to re-emulsify. Finish each mug with a generous dollop of cold whipped coconut cream or a handful of mini marshmallows, then sprinkle dark chocolate shavings or a light dusting of cocoa powder for contrast — the final surface should be pillowy cream or matte marshmallows against the deep, glossy chocolate beneath.
