Creamy Cheesy Potato & Leek Bake
This Creamy Cheesy Potato & Leek Bake is the ultimate comfort food. Tender slices of potato and sweet leeks are layered in a rich garlic cream sauce, topped with plenty of melted cheese, and baked until golden brown and bubbling. The result is a silky, flavorful casserole with a crisp, cheesy crust that makes an excellent side dish or a satisfying vegetarian main course.
Prep Time: 20 minutes
Cook Time: 1 hour 10 minutes
Total Time: 1 hour 30 minutes
Servings: 6
Ingredients
For the casserole
- 1 kg Yukon Gold or Russet potatoes, peeled
- 2 large leeks, cleaned and sliced
- 3 garlic cloves, minced
- 2 tablespoons butter
- 1 tablespoon olive oil
- Salt, to taste
- Freshly ground black pepper
- 1 teaspoon dried thyme
- 1 teaspoon onion powder
- ½ teaspoon nutmeg (optional)
For the cream sauce
- 500 ml heavy cream
- 200 ml whole milk
- 200 g shredded mozzarella
- 150 g Gruyère or Emmental cheese, grated
- 50 g Parmesan cheese, grated
- 1 tablespoon Dijon mustard (optional)
Garnish
- Fresh parsley, chopped
- Extra Parmesan cheese
Instructions
Step 1: Prepare the vegetables
Preheat your oven to 190°C (375°F).
Peel the potatoes and slice them into thin rounds, about 3–4 mm thick.
Wash the leeks thoroughly to remove any grit, then slice them into thin rings.
Step 2: Cook the leeks
Heat the butter and olive oil in a large skillet.
Add the sliced leeks.
Cook over medium heat for about 8 minutes until soft.
Stir in the garlic.
Cook for another minute until fragrant.
Season with:
- Salt
- Black pepper
- Thyme
- Onion powder
- Nutmeg
Remove from the heat.
Step 3: Prepare the cream mixture
In a bowl combine:
- Heavy cream
- Milk
- Dijon mustard
- Half of the mozzarella
- Half of the Gruyère
- Half of the Parmesan
Mix until combined.
Step 4: Assemble the casserole
Grease a baking dish with butter.
Arrange one layer of potato slices.
Spread some of the cooked leeks over the potatoes.
Pour a little cream mixture over the layer.
Repeat until all ingredients have been used.
Finish with the remaining cheese on top.
Step 5: Bake
Cover the dish loosely with foil.
Bake for 45 minutes.
Remove the foil.
Continue baking for another 20–25 minutes until:
- The potatoes are tender
- The cheese is golden
- The sauce is bubbling
If needed, broil for the last 2–3 minutes for extra color.
Step 6: Rest
Allow the casserole to rest for 10–15 minutes before serving.
This helps the creamy sauce thicken and makes slicing much easier.
Tips for Success
- Slice the potatoes evenly using a mandoline for consistent cooking.
- Wash leeks thoroughly, as sand often hides between the layers.
- Gruyère gives a wonderful nutty flavor, but cheddar or Swiss cheese also work well.
- Don’t skip the resting time after baking.
- For extra richness, add a little cream cheese to the sauce.
Delicious Variations
Try adding:
- Crispy bacon
- Cooked ham
- Shredded chicken
- Mushrooms
- Spinach
- Broccoli florets
- Caramelized onions
- Fresh rosemary
- Chives
- Smoked paprika
Storage
Refrigerate leftovers in an airtight container for up to 4 days.
Reheat in the oven at 180°C (350°F) until warmed through, or microwave individual portions.
The casserole can also be frozen for up to 2 months. Thaw overnight in the refrigerator before reheating.
Serving Suggestions
Serve this creamy bake with:
- Roast chicken
- Grilled steak
- Baked salmon
- Pork chops
- Green salad
- Garlic bread
- Steamed green beans
- Roasted asparagus
It also makes a hearty vegetarian meal when paired with a crisp salad.
Approximate Nutrition (Per Serving)
- Calories: 510 kcal
- Protein: 19 g
- Carbohydrates: 34 g
- Fat: 34 g
- Fiber: 4 g
- Sodium: 520 mg
Creamy Cheesy Potato & Leek Bake is a timeless comfort dish that transforms simple pantry ingredients into something truly special. The tender layers of potato soak up the rich garlic cream, while the sweet leeks add delicate flavor and the golden cheese topping creates an irresistible crust. Whether served alongside roasted meats or enjoyed as a satisfying main course, this casserole is perfect for family dinners, holiday gatherings, or cozy evenings at home. It’s rich, comforting, and guaranteed to disappear quickly from the table.