Slow Cooker Foil Packet Sausage and Pierogies are an easy, buttery comfort-food dinner made with frozen pierogies, smoked sausage, onions, and melted butter. The sealed foil packets steam everything until tender while keeping cleanup practically effortless.
Refrigerate leftovers within 2 hours in a covered container and use within about 3 days. Reheat portions in a covered bowl in the microwave until hot, stirring once if possible, or warm them in a covered skillet over medium-low heat. Add a small splash of water or chicken broth if the butter has solidified and the leftovers seem dry. Do not leave the foil packets at room temperature for extended periods.