I think your prank is pretty harmless - it didn't humiliate him, injure him, or cost him any money, so I don't see why people would object to it. You know your husband and his sense of humor, as well as his tolerance level.
I think there are cruel pranks, and harmless ones. The latter (and for me, the definition of "funny") are those when everyone is laughing. If someone is hurt or alarmed, it's another story. Some local DJs lost their jobs a few years ago because they announced that Boston's mayor had been seriously injured in a car crash. I saw a Facebook plea to NOT play an "I'm pregnant" prank because so many people are trying to get pregnant and don't find it amusing that others treat it lightly. So those are totally off limits.
We don't prank, mostly because my husband wouldn't take the time to be that creative, and because he's gullible enough that it would take him way too long to get the joke - so I don't bother. But I wouldn't object to it on principle. We both have really good senses of humor - probably why our marriage has lasted so long!
I think some of the ideas below are funny - like wrapping the kid's snacks in paper and bows. Hilarious! And the fake food is good too. We used to prank our son, and vice versa, by mixing up stuff in drawers/closets or telling him it was a snow day or whatever. I occasionally gave him a paper napkin in his lunch with a shirt outline drawn on it - a reminder to not use his shirt sleeve to wipe his mouth. But everything was relatively tasteful and not designed to hurt, and we all knew the other's sense of humor.
Hope your husband doesn't pay you back with anything crazy! But given the ordeal you've had with your newborn and the painting issues in a small apartment, anything that gives you a laugh is a good thing!