01 - 
                In a bowl, combine crushed graham crackers and melted butter. Mix until well combined.
              
              
              
                02 - 
                Press the graham cracker mixture into the bottom of each jar to form the crust layer.
              
              
              
                03 - 
                In a large mixing bowl, beat the softened cream cheese until smooth. Gradually add powdered sugar, key lime juice, and vanilla extract, mixing until fully incorporated.
              
              
              
                04 - 
                Fold in the whipped topping gently until the mixture is light and fluffy.
              
              
              
                05 - 
                Spoon the cheesecake mixture over the crust in each jar, layering smoothly.
              
              
              
                06 - 
                Chill in the refrigerator for at least 2 hours before serving to allow the flavors to meld. Serve chilled, garnished with lime slices and zest if desired.