What would everyone's favorite flavor of milkshake be? [Also no "ketchup-flavor" one for Sans, that's cheating ;) ]. As an aside, I think Gaster's would be cookies&creme, or coffee.
Sans: Hot dog. Heyyy, I did what you asked! It’s not ketchup! ;) Sorry. Sans is a canonical troll. You’re going to get a troll answer here, too.
Alright alright alright FINE. If you want something slightly non-trollish… then coffee. With Sans’ tendency to fall asleep anywhere and everywhere, I imagine he’s someone who requires caffeine boosts to be halfway functional. He’ll have developed quite the taste in coffee.
Toriel: Snail. Okay okay okay come on. You KNOW it’s snail. It’s so snail flavored milkshake. If she loves the taste of snails so much that she even bakes snail pie, there’s no way I’m doubting she’d drink a snail milkshake, too.
Papyrus: Strawberry. When I first played Undertale, I imagined Papyrus’ first milkshake at Grillby’s being chocolate, for whatever reason (I think that’s because it’s my prototype milkshake flavor). But maybe it was strawberry? For sure, I feel like Papyrus would enjoy the taste of a milkshake that comes from something perceived “healthier.” He’s not someone who enjoys greasy or unhealthy food. Strawberries are going to give you a lot of sugar, but they’ve got a bit of a “healthier vibe” than, say, caramel or coffee!
Undyne: None. She doesn’t like milkshakes. Undyne doesn’t like cold food - she even has a specially constructed refrigerator to keep things warm (why was she “cooking” a popsicle, then? maybe it’s an exception?). Undyne also explicitly states she doesn’t like ice cream multiple times. For instance, in the phone call from room_fire_hotelfront_1, she says:
Oh yeah, that reminds me.I told RG01 and RG02 that if they managed to nab you...I'd take them both out for ice cream.I hope you were able to avoid them.Cause I HATE ice cream!!
Then, when you call Undyne in room_water_nicecream, she says:
Ugh, ice cream!? Sugary... COLD... Talk about GROSS.Now this chilly pink stuff that Alphys makes me...THAT rules!!!
I'll also drink it if it's heated up.
I’m not sure what the “chilly pink stuff” is, and I haven’t seen any convincing explanations on what it is from other speculators. We do know that Alphys makes ice cream with seaweed, as she explains on her date, but it’s up in the air about whether or not Undyne would eat it. On one side, Undyne obviously dislikes ice cream. On the other side, Undyne might eat something she normally wouldn’t because she has a crush on Alphys. In that case, if Undyne ends up liking it, she might not call it “ice cream” out of stubbornness. If somehow Alphys’ “chilly pink stuff” is strawberry ice cream, then maybe Undyne (getting over her stubbornness) could like a strawberry milkshake.
Now if Undyne were someone who liked cold food and had the potential to like a milkshake, I would have normally picked chocolate, being as we know Undyne likes to drink hot chocolate. But since she so adamantly talks about hating ice cream, and milkshakes are made from ice cream, she probably doesn’t like milkshakes.
Alphys: Caramel. Alphys canonically eats a lot of junk food, what between the soda and the instant noodles. Soda tends to give people a bit of a sweet tooth, and I feel that would be the case with Alphys. So for a milkshake, I imagine that Alphys would want something deliciously unhealthy and sugary sweet. You can’t get much sweeter than caramel. I also imagine her liking banana, though, for whatever reason.
Not to give too many flavors... but since she also makes “chilly pink stuff,” we could again say strawberry is something she likes. Or raspberry. I guess sometimes pink flavor is raspberry.
Asgore: Cookies and cream. I feel like he’d enjoy lots of milkshake flavors, though. He’s not picky. He finds them tasty.
Frisk: Cinnamon or butterscotch? XD Hehehehe. Sorry. Couldn’t resist. It’s probably something like caramel!
Chara: Chocolate. Does it even need to be said?
Gaster: Depends what sort of Gaster we’re talking about. Is this Gaster in general as depicted in canon and/or the widespread creativity of fandom? Or is this like, my fic Gaster? Being as I know you know “my Gaster”, I guess I’ll answer for him? You’re right. He would like cookies and cream. He’s also a really big vanilla guy. That’s usually what he orders. After he orders everyone else’s milkshakes. Without asking them what they want. Because he already knows what they like. And he’s going to do it and no one is going to stop him.
I guess you’ve also seen me badly draw Gaster with a chocolate milkshake.
River Person: Cookies and cream. Yes I’m including River Person. Something nice, sweet, and and almost “child-like”. They hum and sip on the milkshake at the same time.














