Hot Chocolate Bar

Add the 1½ cups chocolate chips, ¼ cups cocoa powder, ¼ cups powdered sugar, 14 ounces sweetened condensed milk, 2 cups heavy cream, 6 cups whole milk, and 1 tablespoon vanilla extract to a large crockpot and whisk together.⁴
Cook the mixture on low for 2 hours, stirring occasionally.
While the hot chocolate cooks, set up your bar with your add-ins and toppings. Some ideas include vanilla simple syrup, peppermint simple syrup, gingerbread simple syrup, candy canes, crushed peppermint, toffee bits, chocolate chips, Andes mints, M&M's, sprinkles, sea salt, whipped cream, marshmallows, chocolate syrup, and caramel syrup.
After the 2 hours is up, stir in the 2 cups mini marshmallows and let sit for about 10 minutes and stir them again, they should completely dissolve.
Serve with fun holiday treats like cookies, pirouettes, mug toppers, biscotti, peanut butter balls, truffles, and more!
Hot Chocolate can be kept on warm all day. Store any leftovers in an airtight container in the refrigerator for up to 5 days.