This is heavenly, cheesecake in a jar. Jar Joy is a Floridian company that currently sells cakes in a jar through major retailers, including Sam’s Club and Aldi. The initial Sam’s Club offerings span 75 locations in Florida and Georgia. They also offer flavors that include Summer Strawberry, White Chocolate Raspberry and Cookies n’ Cream. The company also offers three cake-inspired cheesecake flavors: Birthday Cake, Death by Chocolate and Red Velvet.