Oat Milk Hot Chocolate

Name: Oat Milk Hot Chocolate
Prep time: 5 min
Cook time: 7 min
Total time: 12 min
Cuisine: American
Ingredients: 2 cups full-fat oat milk* (such as Oatly Barista Blend); 2 - 3 tablespoons demerara sugar (or light brown sugar); 1 1/2 tablespoons dutch-process cocoa powder; A pinch of salt; 1 1/2 tablespoons chopped vegan dark chocolate (65 to 70% cacao) (0.5 ounce); 1/4 teaspoon vanilla extract; Coconut whipped cream (homemade or store-bought); Chocolate syrup (homemade or store-bought); Vegan marshmallows (homemade or store-bought)