do I need to sell food? I have my business permit! I sell different merchandise from my store! What license do I need to sell food?

I have an business where I sell a mix of products like shoes, clothes and electronics, but I want to start selling soft drinks like soda and juice and small bags of chips and a few candy bars for customers that come in and might want a snack...

I already have an Texas sales and use Tax Permit but I know you will need another type of Permit for selling things in the food category and also what if in the future the business grow and you want to sell cigaretts, what license you will need for that..

Thanks someone please help...