The kitchen was filled with the inviting scent of caramelizing leeks, a sure sign that comfort food was on its way. I was in the midst of preparing Mary Berry’s Potato and Leek Gratin—a quintessential British dish that brings warmth and satisfaction to any meal. With its creamy layers of tender potatoes and savory leeks swimming in a rich cheese sauce, this gratin is not only a delightful side dish but also incredibly easy to whip up for family dinners or holiday gatherings. The best part? It’s a guaranteed crowd-pleaser, making it perfect for both special occasions and cozy evenings at home. Ready to dive into this comforting classic? Let’s get started!

Why is Mary Berry’s Gratin a Must-Try?
Simplicity at its Best: The recipe is straightforward, requiring minimal kitchen skills while delivering maximum comfort.
Creamy, Cheesy Goodness: The rich blend of double cream and cheese creates a luxurious dish that’s perfect for indulging.
Versatile Side Dish: Whether it’s paired with roasted meats or served alongside a fresh salad, this gratin complements various meals beautifully.
Crowd-Pleasing Delight: Ideal for family gatherings and special occasions, it’s sure to impress your guests and leave everyone asking for seconds.
Make-Ahead Convenience: Prep in advance and bake just before serving, making entertaining as easy as pie.
So, if you’re in love with comforting classics, Mary Berry’s Potato and Leek Gratin deserves a spot on your dining table!
Mary Berry Potato Gratin Ingredients
For the Gratin
• Potatoes – Choose waxy potatoes for the best texture in your creamy layers.
• Leeks – Their mild onion flavor enhances the savory depth of this delectable dish.
• Double Cream – Adds a rich creaminess; you can substitute with half-and-half for a lighter version.
• Whole Milk – Helps to balance the richness of the cream, creating a perfect sauce.
• Garlic – Infuses the gratin with aromatic flavor that elevates each bite.
• Salt and Pepper – Essential for seasoning and bringing out the dish’s full flavors.
• Nutmeg – A little warm spice adds a delightful touch; it’s optional but highly recommended.
• Gruyère or Cheddar Cheese – Provides a beautifully cheesy crust; Gruyère melts splendidly while Cheddar gives a sharp flavor.
For Serving Suggestions
• Roasted Meats – This gratin pairs wonderfully with roasted chicken or beef for a complete meal.
• Fresh Salads – For a lighter touch, serve it alongside a vibrant salad that balances the richness.
Prepare to be won over by the sumptuous goodness of Mary Berry’s Potato Gratin—a dish that commands attention on any dinner table!
Step‑by‑Step Instructions for Mary Berry Potato Gratin
Step 1: Preheat the Oven
Begin by preheating your oven to 180°C (160°C fan) or 350°F. This step is crucial for achieving that perfect golden, bubbly top on your Mary Berry Potato Gratin. Once preheated, you’ll ensure the dish cooks evenly and develops a delightful texture.
Step 2: Prepare the Potatoes
Peel and thinly slice the waxy potatoes to about 3mm thick. A mandoline slicer can help achieve uniform thickness, crucial for even cooking. As you slice, layer the potatoes in a large bowl to prevent browning while you prepare the other ingredients for the gratin.
Step 3: Sauté the Leeks
In a sauté pan, melt a knob of butter over medium heat, then add the sliced leeks. Cook for about 5 to 7 minutes, stirring occasionally until the leeks become soft and translucent. This step enhances their natural sweetness, creating a flavorful base for your Mary Berry Potato Gratin.
Step 4: Prepare the Cream Mixture
In a mixing bowl, combine the double cream, whole milk, crushed garlic, a pinch of salt, pepper, and a sprinkle of nutmeg. Whisk until well blended. This creamy mixture will envelop the layers of potatoes and leeks, infusing the gratin with rich flavor as it bakes.
Step 5: Assemble the Gratin
Grease a baking dish with butter, then begin layering the potatoes in a single even layer. Follow with a layer of the sautéed leeks, repeating this process until all ingredients are used, making sure to end with a layer of potatoes on top to create a beautiful finish for your Mary Berry Potato Gratin.
Step 6: Add the Cream Mixture
Pour the prepared cream mixture evenly over the layered potatoes and leeks, ensuring it seeps down through the layers. This step is vital for creating that luscious, creamy texture throughout the gratin. Take a moment to visually ensure all layers are well coated.
Step 7: Top with Cheese
Generously sprinkle your choice of Gruyère or Cheddar cheese over the top layer of potatoes. The cheese will melt and create a beautifully golden crust, enhancing the visual appeal and flavor of your Mary Berry Potato Gratin.
Step 8: Bake the Gratin
Cover the baking dish with aluminum foil and place it in the preheated oven. Bake for about 45 minutes. Then, carefully remove the foil and bake for an additional 15 to 20 minutes, or until the gratin is bubbling and the top is beautifully golden brown.
Step 9: Allow to Cool
Once baked, remove the Mary Berry Potato Gratin from the oven and let it cool slightly for about 10 minutes before serving. This pause allows the layers to set, making it easier to slice and serve, while the aroma wafts through your kitchen, inviting everyone to the table.

Mary Berry Potato Gratin Variations
Feel free to personalize your Mary Berry Potato Gratin with these delightful twists that enhance both flavor and experience!
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Cheese Swap: Try Emmental for a milder taste, or opt for Parmesan for deeper, nutty flavors.
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Veggie Burst: Add layers of fresh spinach or sautéed mushrooms for an extra nutritional kick and earthy depth. It’s a wonderful way to introduce more vegetables while keeping the intense flavors intact.
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Herb Infusion: Incorporate fresh herbs such as thyme or rosemary into your cream mixture for a fragrant twist. They elevate the dish with aromatic notes that harmonize beautifully with the creamy leeks.
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Spicy Kick: Stir in a pinch of cayenne pepper or red pepper flakes for some heat. Adding just a little spice can transform the dish and keep it exciting; your taste buds will surely thank you!
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Dairy-Free Delight: Substitute the double cream with coconut cream or a nut-based cream for a dairy-free version that still offers richness without sacrificing flavor.
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Extra Crunch: Top the gratin with a handful of panko breadcrumbs mixed with melted butter before baking. This adds a lovely crunchy texture that complements the creaminess of the dish, creating delicious contrasts.
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Smoked Flavor: Incorporate smoked cheese, like Gouda, for an additional layer of flavor that brings a delightful twist to your comforting gratin.
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Layered Goodness: Consider adding roasted vegetables, like butternut squash or sweet potatoes, between the layers. Not only does this enhance the visual appeal, but it also adds sweetness and depth, making every bite interesting.
For an indulgent dinner alongside your gratin, why not try it with Garlic Potatoes Gratin or complement it with a side of Slow Cooker Potatoes? Enjoy the exploration of flavors!
How to Store and Freeze Mary Berry Potato Gratin
Fridge: Store your cooked Mary Berry Potato Gratin in an airtight container for up to 3 days. Allow it to cool to room temperature before sealing to maintain freshness.
Freezer: For longer storage, wrap the cooled gratin tightly in plastic wrap and foil, keeping it for up to one month. Label it with the date for easy tracking.
Reheating: Thaw overnight in the fridge before reheating. To warm up, cover with foil and bake at 180°C (350°F) for about 25-30 minutes until heated through and the cheese is bubbling.
Make-Ahead: Prepare the gratin up to the baking stage and refrigerate for up to 24 hours for a hassle-free meal prep option!
Make Ahead Options
These Mary Berry Potato and Leek Gratin are perfect for busy home cooks looking to save time during hectic weeknights! You can prepare everything up to the baking stage up to 24 hours in advance. Simply assemble the dish, layering the potatoes and leeks, and pour the creamy mixture over the top. Make sure to cover the dish tightly with foil as you refrigerate it to preserve freshness. When you’re ready to serve, bring the gratin to room temperature, top with cheese, and bake as instructed. By prepping in advance, you’ll have a comforting, cheesy side ready to delight your family without the last-minute stress!
Expert Tips for Mary Berry Potato Gratin
Uniform Slices: Ensure your potato slices are uniform at about 3mm thick to promote even cooking and a perfect texture in your gratin.
Baking Time Adjustment: If the gratin appears undercooked or the potatoes remain firm, don’t hesitate to extend baking time until tender and golden.
Make-Ahead Magic: Prepare your dish up to the baking stage, refrigerate for up to 24 hours, and let it come to room temperature before baking for ultimate convenience.
Freezing Tips: For longer storage, cool completely before wrapping tightly and freezing your Mary Berry Potato Gratin for up to one month, ensuring delicious leftovers.
Nutmeg Note: A sprinkle of nutmeg is optional, but it adds a lovely warmth; be cautious not to overdo it, as a little goes a long way!
What to Serve with Mary Berry’s Potato and Leek Gratin
Looking to create a comforting meal around the rich, creamy layers of this gratin? Let’s explore some perfect pairings!
- Roasted Chicken: The juicy flavors of roasted chicken balance beautifully with the creamy gratin, making every bite delectable. This classic duo truly satisfies cravings.
- Green Salad: A fresh garden salad with a light vinaigrette adds a crisp, refreshing contrast to the rich gratin, bringing harmony to your meal. It acts as a perfect palate cleanser.
- Steamed Broccoli: A side of tender, vibrant broccoli offers a delightful crunch and a nutritious pop of color, enhancing both flavor and presentation as a healthy companion.
- Beef Wellington: This showstopper pairs perfectly with the gratin, as the richness of the Wellington complements the creamy layers, creating a luxurious dining experience.
- Red Wine: A glass of medium-bodied red wine elevates the meal, its fruity notes bringing out the cheese and potato flavors, making your dinner even more sophisticated.
- Garlic Bread: Crispy, buttery garlic bread adds a delightful texture and enhances the comforting vibe, perfect for soaking up any leftover creamy sauce.
- Sautéed Spinach: Lightly sautéed spinach with garlic offers a delicate, earthy flavor that complements the gratin, making for a well-rounded, wholesome meal.
- Mushroom Risotto: For something indulgent, creamy mushroom risotto pairs well with the layered gratin, creating a heavenly combination that warms the soul.
- Apple Crisp: Finish off your meal with a warm apple crisp for dessert—the sweet and buttery flavors provide a beautiful contrast to the savory gratin.
- Sparkling Water: Pair your meal with a refreshing sparkling water or herbal iced tea to cleanse your palate, making each bite of gratin a fresh delight.

Mary Berry’s Potato and Leek Gratin Recipe FAQs
How do I choose the right potatoes for my gratin?
Absolutely! For the best texture in your Mary Berry Potato Gratin, opt for waxy potatoes like Yukon Gold or Charlotte. These varieties hold their shape well and create a creamy, tender bite without becoming mushy during baking. Look for potatoes that are firm and free of dark spots or blemishes.
How should I store leftover gratin?
You can store your delicious Mary Berry Potato Gratin in an airtight container in the fridge for up to 3 days. Make sure to allow the dish to cool to room temperature before sealing it to preserve its wonderful flavors. For longer storage, consider freezing it!
Can I freeze Mary Berry Potato Gratin?
Definitely! To freeze your gratin, first let it cool completely. Wrap it tightly in plastic wrap and then in foil to prevent freezer burn. It will keep well in the freezer for up to one month. When you’re ready to enjoy it, thaw overnight in the fridge before reheating.
What should I do if my gratin isn’t set?
Very! If your Mary Berry Potato Gratin isn’t set or the potatoes are firm after the recommended baking time, simply cover it with foil and extend the baking by 10-15 minutes. This extra time will allow the potatoes to become tender and the dish to achieve that lovely golden top.
Can I make this gratin ahead of time?
Absolutely! You can prepare the gratin up to the baking stage and refrigerate it for up to 24 hours. Just be sure to bring it to room temperature before popping it into the oven. This not only saves time but also allows the flavors to develop beautifully.
Are there any dietary considerations I should keep in mind?
Indeed! If you’re making the Mary Berry Potato Gratin for guests with dietary restrictions, you can substitute the double cream with a non-dairy alternative like coconut milk for a vegan option. Keep in mind that any substitutions may slightly alter the taste and texture, so it’s a good idea to test it out first!

Mary Berry's Potato Gratin: Creamy Comfort Food Bliss
Ingredients
Equipment
Method
- Preheat your oven to 180°C (160°C fan) or 350°F.
- Peel and thinly slice the waxy potatoes to about 3mm thick.
- Melt a knob of butter in a sauté pan and add the sliced leeks. Cook for about 5 to 7 minutes.
- In a mixing bowl, combine the double cream, whole milk, crushed garlic, salt, pepper, and nutmeg. Whisk until well blended.
- Grease a baking dish with butter. Layer the potatoes, followed by leeks, until all are used.
- Pour the cream mixture evenly over the layered ingredients.
- Sprinkle the chosen cheese over the top layer of potatoes.
- Cover with foil and bake for about 45 minutes. Then remove the foil and bake for an additional 15-20 minutes.
- Allow the gratin to cool for about 10 minutes before serving.

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