Can molk be mixed with regular milk?

Yes, molk can definitely be mixed with regular milk. Jocko Willink and Echo Charles discuss various combinations of molk with different types of milk, including regular milk. They note that molk mixed with milk is considered "legit" and akin to a mint chocolate chip milkshake in terms of flavor and satisfaction 1 2 3.

Mixing molk with regular milk is also suggested as an enjoyable way to consume it, and they have even experimented with other types of milk like almond and coconut milk for those who are lactose intolerant or seeking variety 4 5. Hence, if you prefer regular milk, it should blend well and taste great.