Chena pudo. You can get it at Jagannath temple.
Lawanglata a traditional Bihar sweet dish. It's a broad ring shaped sweet filled with mawa and dipped in chashni. So crispy and yummy. Definitely a must try if you visit Bihar :)
Kaju Katli, Rasmalai, Motichur ka laddoo
Atta laddu made by my mom
Rasmalai from Chaudhary sweet corner shakti nagar, Kamla Nagar
Gulab jamun from anywhere i guess