Sage Potatoes au Gratin

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Potatoes au Gratin has the ability to make potatoes incredibly flavorful and elegant. The best thing is, they are also so very easy to make! #winning

Forget the peeling and boiling of the potatoes. For this recipe they just need to be sliced thin. The texture of these thin potatoes is so perfect because it allows them to absorb the sage infused cream mixture in which they cook. Sprinkled with generous amount of parmesan cheese, these potatoes will complete your meal.

Instructions on how to make this Sage Potatoes au Gratin:

In a small sauce pan, heat the heavy cream and the half and half. Then add 4-5 whole sage leaves. Let the mixture come to a simmer and remove it from the heat. Let it sit while you work on the potatoes. In the meantime, the sage will continue to steep into the cream mixture.

Tip! Warming the milk and sage, infuses the milk with the amazing aroma of the sage without it being overpowering.

Place a mandolin slicer over a large bowl.

I prefer to use a mandolin slicer as it makes the job even easier. However, if you do not have one, you can just slice them as thin as you can with your kitchen knife.

Tip! Be very careful handling the mandolin slicer, the blade is very sharp. So, it’s best to use the safety attachment to hold the potatoes in place.

The sides of some graters actually have a long slicer that can be used as well.

Cut off one end of the potato, and start slicing it using the thinnest slice setting on the mandolin. When you’re done slicing the potato, discard the other end left on the potato.

Once all the potatoes are sliced, it’s time to season them.

Season the potato slices generously with salt and pepper. This is your only opportunity to season them before they bake, so make sure you are not skimping on the seasoning. There is nothing worse than a salt-less potato!

Add the parmesan cheese and mix well. Make sure all slices are coated in the seasonings. You might need to fan out some of the slices if they are stuck together.

Chop the remaining 5 leaves of sage finely and add to the potatoes. Keep mixing them to spread the little bits of sage evenly throughout the potatoes.

Coat the bottom of a baking dish with olive oil and place the potatoes in the baking dish.

Remove the sage leaves from the milk mixture and discard them. Pour the milk over the potatoes.

Pat the potatoes down to make sure they are practically completely covered in the liquid.

Tip! If you are a bit short on the liquid (sometimes it depends on the baking dish you use), just add more half and half directly on the potatoes, it’s not a big deal!

It’s important to trust your eyes and your judgement when it comes to cooking. Potatoes absorb liquids like a sponge so be mindful of the amount of milk you add. They are not supposed to be “swimming” in liquid but as long as they are practically covered in it, it will be perfect!

Sprinkle parmesan cheese on top of the potatoes, I am a very generous parmesan sprinkler HA! Why not right? It will add saltiness and that delicious nutty parmesan cheese flavor to the dish.

Cover the baking dish with aluminum foil. Make sure it’s tightly presses around the baking dish. I usually add two layers of it.

Tip! Adding two layers of aluminum foil, protects the potatoes from drying out and it prevents steam from escaping, which helps the potatoes cook faster.

Bake the potatoes in a preheated 375° oven for 35 minutes.

Remove the aluminum foil and check to see if the potatoes are cooked all the way through.

Tip! I like to use a fork and just insert it into the potatoes, if it goes in nice and easily, they are done. If they feel hard to poke, cover and bake a little more.

If the potatoes are cooked, remove the foil and bake uncovered until it is nice and golden all over. This will take about 10-15 more minutes.

Tip! Baking uncovered will help reduce any excess liquid as well.

Once the potatoes are baked to golden perfection, remove from the oven and let sit for at least 10 minutes before serving. This step will help them settle and finish absorbing any excess liquid. Plus, it will make them safer to eat as they will be pipping hot!