Trader Joe's is an extremely popular grocery store chain. According to Business Insder, it is "known for its cheap, private-label products, which have created a cult following in the US." Recently customers were surveyed and asked their favorite food-items Trader Joe's sells. Here are a few: They love Trader Joe's Mandarin Orange Chicken, their Almond Kringle, Dark Chocolate Peanut Butter Cups, and their Cold Brew Coffee Concentrate.