Classic Scalloped Potatoes – A Creamy Comfort Food Classic

Scalloped potatoes are the ultimate comfort food – tender, thinly sliced potatoes baked in a rich, creamy sauce until golden and bubbling. This classic side dish is perfect for family dinners, holiday feasts, or any occasion that calls for something warm and satisfying. With its velvety texture and aromatic herbs, it pairs beautifully with roasted meats, grilled steak, or baked ham.

What Makes This Recipe Special

This scalloped potato recipe is all about simplicity and flavour. A creamy béchamel-style sauce, infused with fresh thyme and parsley, coats each layer of tender Yukon Gold potatoes. The result is a dish that is both rustic and elegant – comforting enough for a weeknight supper yet impressive enough for a festive table.

A Versatile Side for Any Meal

Scalloped potatoes are wonderfully versatile. Serve them alongside a Sunday roast, a glazed ham, or a simple grilled chicken breast. They also make a delicious vegetarian centrepiece when paired with a fresh green salad and crusty bread. However you choose to enjoy them, this dish is guaranteed to become a firm favourite.

Ingrédients

This recipe serves approximately 6 to 8 people as a side dish. The quantities can be easily adjusted for larger or smaller gatherings.

Butter – 4 tablespoons (60 g), unsalted
Plain flour – 4 tablespoons (about 30 g)
Onion – 1 medium, finely chopped
Garlic – 3 to 4 cloves, minced
Whole milk – 3 cups (720 ml)
Fresh thyme – 1 tablespoon, chopped
Fresh parsley – 1 tablespoon, chopped
Cayenne pepper – ⅛ teaspoon (optional, for a gentle warmth)
Kosher salt and freshly ground black pepper – to taste
Yukon Gold potatoes – 3 lb (about 1.4 kg), thinly sliced

Préparation

Follow these step-by-step instructions for perfectly creamy, tender scalloped potatoes every time.

Step 1: Preheat and Prepare

Preheat your oven to 175°C (350°F). Grease a 9×9 inch square baking dish or a shallow 2-quart (approximately 2-litre) casserole dish with butter or cooking spray to prevent sticking.

Step 2: Make the Cream Sauce

In a large skillet or saucepan over a medium heat, melt the butter. Add the chopped onion and cook for about 4 to 5 minutes, until softened and translucent.
Lower the heat and add the minced garlic. Cook for a further minute, stirring constantly to prevent the garlic from burning.
Sprinkle the flour over the onion and garlic mixture. Whisk constantly for about 2 minutes to cook out the raw flour taste and create a roux.
Gradually pour in the whole milk while continuing to whisk. This helps to prevent lumps from forming. Cook over a low heat, stirring frequently, until the sauce thickens to a smooth, creamy consistency. Do not allow the sauce to boil.
Stir in about two-thirds of the chopped thyme and parsley, along with the cayenne pepper (if using). Season generously with kosher salt and freshly ground black pepper to taste. Remove from the heat and set aside.

Step 3: Layer the Potatoes

Place a quarter of the thinly sliced potatoes evenly across the bottom of the prepared casserole dish.
Pour a quarter of the cream sauce over the potatoes, spreading it out with a spoon or spatula to ensure even coverage.
Repeat this layering process three more times, finishing with the remaining cream sauce poured over the top layer of potatoes.
Sprinkle the remaining fresh herbs over the final layer for a beautiful finish.

Step 4: Bake to Perfection

Cover the casserole dish with aluminium foil and bake for 45 minutes. This allows the potatoes to steam and cook through without the top browning too quickly.
After 45 minutes, remove the foil and continue to bake uncovered for a further 30 to 45 minutes. The dish is ready when the potatoes are tender when pierced with a knife and the sauce is bubbling around the edges. For a golden, crispy top, turn on the grill (broiler) for the final 1 to 2 minutes, keeping a close eye to prevent burning.

Tips for Perfect Scalloped Potatoes

These simple tips will help you achieve the best possible results every time you make this dish.

Choosing the Right Potatoes

Yukon Gold potatoes are ideal for scalloped potatoes due to their creamy texture and buttery flavour. Russet potatoes also work well. Slice the potatoes thinly and uniformly – about ⅛ to ¼ inch (3 to 6 mm) thick – to ensure even cooking. A mandoline slicer makes this task quick and effortless.

Fresh vs. Dried Herbs

Fresh herbs truly elevate this dish, but dried herbs can be used in a pinch. As a general rule, use about one-third of the amount if substituting dried herbs for fresh, as dried herbs are more concentrated in flavour.

Layering Seasoning

For an extra burst of flavour, consider adding a pinch of salt, pepper, and fresh herbs to each layer of potatoes as you build the dish. This ensures the seasoning is evenly distributed throughout.

Cheesy Au Gratin Variation

To transform these scalloped potatoes into cheesy au gratin potatoes, whisk about 2 cups (200 g) of shredded cheddar cheese into the cream sauce just before layering. You can also sprinkle extra cheese on top during the final 10 minutes of baking for a golden, crispy crust.

Watch the Broiler

Broilers can vary in intensity, so keep a close eye on the dish during the final browning stage. A timer set for 1 to 2 minutes is a good safeguard against over-browning.

Storage and Reheating

Store any leftover scalloped potatoes in an airtight container in the refrigerator for up to 3 days. To reheat, warm them in the oven at 175°C (350°F) until heated through, or use a microwave for a quicker option. If the sauce seems thick, add a splash of milk before reheating.

Frequently Asked Questions

Can I prepare scalloped potatoes ahead of time?

Yes. You can assemble the dish up to the baking stage and store it, covered, in the refrigerator for up to 24 hours. When ready to bake, allow it to come to room temperature for about 30 minutes, then bake as directed, adding a few extra minutes to the cooking time if it is still cold.

What is the best type of potato for scalloped potatoes?

Yukon Gold and Russet potatoes are both excellent choices. Their high starch content helps achieve that signature creamy texture.

Can I use non-dairy milk?

Absolutely. Unsweetened almond milk, oat milk, or coconut milk can be used as a substitute for whole milk. Choose a variety with a neutral flavour to maintain the savoury character of the dish.

How can I make this dish gluten-free?

To make gluten-free scalloped potatoes, replace the plain flour with a gluten-free flour blend or cornflour (cornstarch). You may need to adjust the quantity to achieve the desired sauce consistency.

Can scalloped potatoes be frozen?

While scalloped potatoes are best enjoyed fresh, they can be frozen. Allow the dish to cool completely, then transfer it to a freezer-safe container. It will keep for up to 3 months. Thaw overnight in the refrigerator before reheating in the oven.

Final Thoughts

Scalloped potatoes are a timeless dish that never fails to bring warmth and comfort to the table. With their creamy layers, aromatic herbs, and golden top, they are the perfect accompaniment to any meal. Whether you are cooking for a crowd or simply treating yourself to something special, this recipe is sure to become a cherished favourite in your kitchen.

Enjoy the simple pleasure of perfectly baked, creamy scalloped potatoes.