Au Gratin Potatoes for 50

For the creamiest texture, avoid boiling the potatoes until they're too soft, as they will continue to cook in the oven.

To get a golden and crispy top, you can broil the potatoes for a few minutes after baking, watching carefully to prevent burning.

For best results, do not use pre-shredded cheese as they contain anti-caking ingredients that inhibit melting.

Allowing the dish to rest for 10-15 minutes after removing it from the oven will help the sauce thicken and make serving easier.

Can I prepare this dish in advance?

Yes, you can assemble the dish up to a day in advance and refrigerate. Before baking, let it come to room temperature or add extra cooking time to compensate.

Is there a gluten-free alternative for the flour?

To make this gluten-free, you can substitute the all-purpose flour with a gluten-free flour blend designed for thickening, or use cornstarch (use half the amount of flour called for).

Can I use a different type of cheese?

While Cheddar provides a classic taste, you can experiment with Gruyere, Swiss, or a mix of your favorite cheeses for a different flavor.

What's the best way to slice the potatoes?

For even cooking, slice the potatoes about 1/8iinch thick. A mandoline slicer can help achieve uniform slices, but a sharp knife works well too. Or, cube them in uniform sizes.

How can I prevent the potatoes from discoloring?

To prevent discoloration, place the peeled and sliced potatoes in cold water until you're ready to boil them. Drain and cook as directed.

Can I add other ingredients?

Feel free to incorporate diced onions, minced garlic, or chopped herbs into the sauce for added flavor, or layer in some cooked bacon or ham with the potatoes.

What if the sauce is too thick or too thin?

If the sauce is too thick, whisk in additional milk, a little at a time, until the desired consistency is reached. If it's too thin, cook longer to reduce or mix a small amount of flour with butter and whisk into the sauce to thicken.

How do I store leftovers?

Store leftovers in an airtight container in the refrigerator for up to 3-4 days. Reheat in the oven or microwave until thoroughly warmed.

Can I freeze this dish?

Yes, au gratin potatoes can be frozen before or after baking. Wrap the pan well with foil and freeze for up to 3 months. Thaw overnight in the refrigerator before baking or reheating.