Canned tart cherries are generally found in the canned fruit section at your grocery store. As they’re not generally a big seller, they’re usually on the top or bottom shelf. Frozen berries and cherries are perfect for this recipe. Thaw the fruit in the refrigerator overnight (in a bowl to collect the juices) and proceed with the recipe as written.
Tip: To avoid watering down the final product with ice cubes, make a punch cube: before adding the seltzer and lime juice, pour about 1 ½ cups of the punch into a round plastic bowl or food storage container. Add a few fresh berries into the container and freeze until solid. Use your punch cube to keep everything nice and cold during service.