this question popped into my head and now im a bit interested, i'm thinking it'd be some sorta juice like apple juice
#What would Madeline's favorite beverage be?
hard spear
I dunno about apple juice, she mentioned she drinks in reflection, so I’d guess some sort of wine
hard spear
But who knows, maybe she drinks only when she’s out is apple juice
tardy pendant
She only says she drinks, doesn't mention alcohol. Maybe she meant she drinks apple juice 
sonic comet
perhaps it's strawberry caipirinha
She made it with Theo before she went to the Core
Source: Theounderstars instagram account
muted dove
protein shake
median crane
Estrogen
quiet fractal
strawberry smoothie
azure rapids
i dono can of coke 
brisk pelican
well just cause it shows a cup of tea doesnt mean its her favorite but its a good thing to point out
jovial zenith
true
I just realised she just woke up, which means the tea bag has been in the tea all night
Maybe that means she didn't drink it, and she doesn't like tea 
lilac cave
I just realised she just woke up, which means the tea bag has been in the tea al...
Or she made it, drank it in bed, then cba to get up and put the teabag in the bin
old dust
I like to think that after the events of the main story, Madeleine decides to quit drinking. 
Or at least drink less.
old dust
and i think that means she likes harder drinks
I feel like beer would be too basic for Madeline’s taste, so yeah, she’d probably be drawn to stronger ones. :o
sonic comet
She probably likes nicer tasting ones too beer tastes like piss water
old dust
Of course. She’s a girl with taste.