Most dark chocolate is dairy free. However one should carefully inspect the label to ensure that the chocolate does not contain any dairy ingredients to be safe, as it can still cause issues for those with sever milk allergies.
Just because a dark chocolate bar does not contain milk, does not mean it is allergy free. Many chocolate makers use shared equipment to produce both milk and dark chocolate bars, and often dark chocolate bars that are dairy free, may still contain traces of milk.If you have a truly severe milk allergy as opposed to lactose intolerance, or want to avoid non-vegan products, most chocolate should be avoided because of the shared equipment use.
Milk, white, and ruby chocolates all contain milk or milk powders, and must be avoided completely.If you have a dairy allergy or are vegan, and have a craving for milk chocolate, look for milk chocolates that are made with non-dairy milk alternatives like coconut, almond, and oat milk.