In Daddy's Home, Ferrell plays a nerdy step-dad who is competing for the affections of his step children when their real bad boy dad (Wahlberg) comes for a visit.
Well, E! News thought we'd give the actors a true fatherhood test with a gingerbread house decorating contest.
The two had just 60 seconds to decorate their holiday homes.
Check out the video above to see what happened. Let's just say things got a bit out of hand by the end.
Wahlberg cracked, "This is like Martha Stewart s--t!"