Yes, you can freeze Danishes with puff pastry. Place each one on a baking sheet then freeze uncovered for 30 minutes. This ensures the plastic wrap won't stick to the filling. Wrap individually in plastic wrap then transfer to a freezer bag. Freeze for up to 2 months. To defrost, thaw pastries in the refrigerator overnight then reheat in the oven at 350F for 10-15 minutes or until hot and crispy again.