Add all ingredients to slow cooker EXCEPT alcohol
½ gallon full fat milk, 14 oz sweetened condensed milk, 2⅔ cups milk chocolate chips, ½ teaspoon vanilla extract
cover and cook on low for 1½ hours
remove cover and stir well. The chocolate will melt but will be laying on the bottom. Stir to mix chocolate fully in with the milk.
replace lid and repeat every 10 minutes until chocolate is fully melted and mixed in.
If you will be serving children, stop here.
To spike drink, just before serving, add ½ cup vanilla or whipped cream vodka, ¼ cup Bailey's Irish cream, and ¼ cup chocolate liqueur
If you will be serving both adults and children, alcohol can be added on a per-glass basis. Add a shot of vanilla vodka and a splash of each liqueur to each cup of hot chocolate.
top with whipped cream and serve and ejnoy