Below are some of the recipes I personally enjoy and/or have used as ADVs at one point and time.

Scutch - A RY4/Custard hybrid which I find amazing. (Replaced RWhy4 as an ADV)

Cola Gummy - Haribo Cola Gummies (with some ice).  Yum!

Ecto-1 -
Lemon lime punch.

Tropic Breeze - I get a taste similar to Pez candy.