Cupcake, lol eat 3 to 6 cupcake a day it was ONLY thing that helped me gain weight I've tried everything else, with no luck lol I used to be 88-90 pound I don't know how to convert it to kilograms sorry! And I'm 5'2 but one summer I craved cupcake and I found my #1 favorite combination and I ate couple of it for 6 months and gained 20 pound now I'm 112-115 pound which is healthy weight for my height. The combination for me was butter recipe yellow cake mix with rainbow morsels in white frosting can. YUM but I had to stop and only eat 1-2 a day when I baked some I only baked 1 batch once every like 4 months so I don't gain any more lol
So try cupcake!!
Btw I forgot to add, I used to have stubborn ulcers that won't go away for 2+ years and it went away as I gained weight, only trouble I have right now is heartburn/reflux and pepcid ac 2-in-1 chewable tablet solved that easily. Yay lol