These grocery store deli soups taste homemade, according to loyal shoppers. However, some deli soups come close. Whether you are hitting the hot bar or the pre-packaged ready-to-heat section in the deli, your grocery store is likely stocked with in-house soups. Here are 6 grocery stores with the best deli soups, according to shoppers. CostcoMy favorite grocery store soup is the rotisserie chicken noodle soup at Costco, which tastes as close to Chick-fil-A soup as possible.