You can make the dough up to 2 days in advance and store it in the refrigerator. Just make sure you put it in a large enough bowl or plastic bag to contain it as it will continue to expand. When you’re ready to make the kolaches, bring the dough to room temperature before forming the balls and adding the filling. The dough will be easier to work with when it’s not cold. The filling can be made ahead and kept in an airtight container in the fridge as well.
You can also bake the kolaches, allow them to cool, and then store them in an airtight container on the counter for 3 days or in the refrigerator for 5 days. They can also be frozen for up to 6 months. If you freeze them on a baking tray first and then add them to a plastic storage bag the rolls won’t stick together when they’re frozen. To reheat, add them to a preheated 325 F oven for 5-10 minutes or until defrosted. They can also be defrosted at room temperature or for 30 seconds to 1 minute in the microwave.