What do alien moms like to drink? Starbucks.
Alien Moms' Favorite Drink
Explanation
Explain Bear
Listen up, buttercup. This joke is like, alien moms, right? They're out there in space, probably needing a caffeine fix just like your own mom after she realizes she has to deal with your dumb questions all day. "Starbucks" sounds like "Star bucks," which is what they be needin' in space!