Gaining

Good calorie-heavy drinks?

I live with family and I don’t want them to know that I’m gaining on purpose, so drinking heavy cream or gainer shakes isn’t really an option for me, they’d catch on straight away that something was up. Over the holidays I have been drinking eggnog with great results, but now that the holidays have ended it isn’t in stores anymore. Is there anything comparable that I could drink that would also be believable as something I was just drinking because I liked it? My stomach capacity isn’t great so it should preferably be something that packs a lot of calories into one cup. The brand of eggnog I was getting had 420 calories in one cup.
4 years