Searching for specific social story series

Aba123sa1

Hi there. I am searching for a specific series of books. I don't remember much about the books. However one was about the steps to bake a cake I believe at grandmas. Another was about working together with friends on an alien planet and figuring out what the aliens were saying. Part of that book involved a backpack with different items in them.
These books were awesome and I really hope someone knows what I'm talking about. Thank you for any help!