This make-ahead mashed potato casserole is a creamy, cheesy, and comforting dish that is perfect for any occasion. With the convenience of being prepared in advance, it allows you to enjoy a stress-free meal that’s sure to please everyone at the table.
Ingredients:
- Potatoes:
- 1.75 kg (3.5 lbs) of potatoes, such as Sebago (Australia), Russet (USA), or Maris Piper/King Edwards (UK).
- 1 tbsp cooking/kosher salt (for cooking potatoes)
- For the Mash:
- 2/3 cup milk (preferably full-fat/whole milk, but lite is okay)
- 2/3 cup extra milk (for make-ahead option only)
- 75g / 5 tbsp unsalted butter, cut into 1cm / 1/2″ cubes
- 1/2 cup sour cream (or yogurt), full-fat is best
- 1 tsp cooking/kosher salt (or to taste)
- Cheese:
- 1 1/2 cups of freshly shredded mozzarella cheese, tightly packed
- 1 cup (tightly packed) Red Leicester, cheddar, or other flavored cheese
- Toppings:
- 200g / 6 oz bacon (streaky), chopped
- 1/4 cup green onion, finely sliced
Instructions:
- Prepare the Potatoes:
- Peel and cut the potatoes into even-sized chunks. Put them in a large pot and fill it with cold water until the potatoes are fully submerged.
- Add 1 tablespoon of cooking/kosher salt.
- Set the pot over high heat and bring the water to a boil, then lower the heat to a simmer. Cook until the potatoes are very tender, about 15-20 minutes.
- Make the Mashed Potatoes:
- Thoroughly drain the potatoes and place them back in the pot. Let them rest for a minute to let any remaining moisture evaporate.
- Add the 2/3 cup of milk, butter, sour cream, and 1 tsp of cooking/kosher salt. Mash until smooth and creamy. Adjust the salt to taste.
- Mix in the Cheese:
- Stir in 1 1/2 cups of shredded mozzarella and 1 cup of Red Leicester, cheddar, or other flavored cheese until well combined.
- Prepare the Bacon:
- In a skillet, fry the chopped bacon over medium heat until it becomes crispy. Drain on paper towels.
- Assemble the Casserole:
- Preheat your oven to 375°F (190°C). Grease a 9×13 inch baking dish.
- Spread the mashed potato mixture evenly in the baking dish. Sprinkle the cooked bacon and sliced green onions on top.
- Make-Ahead Option:
- If preparing in advance, cover the dish tightly with plastic wrap and refrigerate. Before baking, take it out of the fridge and let it sit at room temperature for 30 minutes.
- Stir in the extra 2/3 cup of milk to loosen the mixture before topping with bacon and green onions.
- Bake the Casserole:
- Place in the preheated oven and bake for 25-30 minutes, or until the top is golden brown and bubbling.
- Serve:
- Allow the casserole to cool for a few minutes before dishing up. Enjoy this creamy, cheesy delight with your favorite main course.
Conclusion:
This make-ahead mashed potato casserole is the perfect blend of creamy potatoes, melted cheese, and crispy bacon, topped with fresh green onions. Ideal for gatherings or weeknight dinners, this dish offers the convenience of preparation ahead of time without compromising on flavor. Enjoy the rich and comforting taste of this delicious casserole with your loved ones.