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    Home » Blog » Recipes

    Scalloped Potato Gratin (Lightened Up!)

    Published: Dec 18, 2018 · Updated: Dec 3, 2021 · This post may contain affiliate links. · 6 Comments

    Jump to Recipe - Print Recipe

    Any good scalloped potato dish will give you creamy, delicious potatoes while any potato gratin will give you decadently cheesy potatoes. This healthy scalloped potato gratin recipe combines the best of both worlds, but with some lighter modifications! Serve this at your holiday table and your guests will leave with their taste buds satisfied, but not overly full. 

    Thinly sliced yukon gold potatoes baked with a greek yogurt-based cream sauce & cheese for a lighter scalloped potato gratin. A healthy holiday side dish!

    Healthy Scalloped Potato Gratin

    I'll be totally honest - I don't think any type of scalloped potatoes or potatoes au gratin have ever landed on any holiday table, growing up or as an adult. See, mashed potatoes have always been the go-to for most family holiday gatherings (and when they taste as good as my greek yogurt mashed potatoes, it's hard to want to deviate!). The few times we have deviated we've kept it simple with a basic roasted potato or even simple baked sweet or white potatoes. 

    Plus, my mom always told us a story growing up how in college my dad ate so much potatoes au gratin that he never wanted to eat it again! So she never made it, holiday or not! 

    But when I was asking what kind of holiday recipe/ holiday side dish you guys wanted to see a healthier recipe for on the blog, scalloped potatoes and potatoes au gratin kept coming up. And seriously - I do my absolute BEST to deliver what you guys want! 

    Also seriously? THANK YOU! I'm not sure why it took me so long to make this, but I am a happy to add these lighter scalloped potatoes gratin to my family's side dish rotation!

    Scalloped Potatoes vs Potatoes Au Gratin

    Scalloped potatoes = creamy potato perfection.

    Potatoes au gratin = cheesy potato perfection.

    Scalloped potato gratin = the best of both worlds! This is basically just a baked, layered potato dish with a creamy sauce and cheese, all topped with cheese that gets melty, bubbly, golden brown.

    Thinly sliced yukon gold potatoes baked with a greek yogurt-based cream sauce & cheese for a lighter scalloped potato gratin. A healthy holiday side dish!

    The Healthy Hack in This Scalloped Potato Gratin

    And to make it even better, I used a healthy hack to lighten up this scalloped potato gratin a bit so my family and I can still indulge in creamy, cheesy potatoes without an instant stomach ache. What's the healthy hack? Simple: greek yogurt. 

    All I did was nix the heavy cream  and/ or whole milk that's in most scalloped potato recipes and made a creamy sauce based out of greek yogurt instead. Especially if you're looking for a more balanced side dish better for blood sugar regulation, this scalloped potato gratin with the healthy hack still has the carbs from the potatoes and fat from the cheese, but more protein from the greek yogurt.

    How to Make a Scalloped Potato Gratin

    Making this gratin isn't the quickest potatoes au gratin recipe, but once you get some basic slicing and assembly out of the way, most of the work is done in the oven!

    1. Peel and slice your potatoes very thinly. You can either use a sharp chef's knife to slice the potatoes into ¼-inch thick rounds or you can use a mandolin slicer. Warning: be careful if you're using a mandolin slicer! Many chefs and cooks I know (myself included!) have horror stories going along with their scars and battle wounds from using a mandolin.
    2. If you're using a block of cheese to freshly grate yourself (which I highly recommend!), go ahead and grate your cheese now. Bonus cheese tip? As much as there's a ton of flavor in aged sharp cheddar cheeses, avoid using an aged cheddar in this recipe as aged cheeses don't seem to melt quite as luxuriously!
    3. Whisk together your greek yogurt-based creamy sauce.
    4. Assemble by layering your potatoes, sauce, and cheese a couple times.
    5. Place it your assembled scalloped potato gratin in the oven and let it back away until the potatoes are tender and the cheesy top is bubbling and golden brown.
    Thinly sliced yukon gold potatoes baked with a greek yogurt-based cream sauce & cheese for a lighter scalloped potato gratin. A healthy holiday side dish!

    Equipment I used in this recipe (affiliate links):

    • Essentials: baking dish or pie pan, bowls, whisk, spoons
    • cheese grater
    • mandolin slicer - this one includes cut-resistant gloves, which I highly recommend for safety! (You can also use a sharp chef's knife instead!)

    Looking for other recipes for a holiday menu? Try these!

    • Pomegranate Maple Glazed Ham
    • Maple Dijon Brussels Sprouts
    • Cinnamon Glazed Carrots
    • Chocolate Peppermint Avocado Truffles
    • Healthy Buckeyes

    Don't forget, whenever you make an NTF recipe be sure to share it to social media (@nutritiontofit #nutritiontofit) for a chance to be re-shared!

    Thinly sliced yukon gold potatoes baked with a greek yogurt-based cream sauce & cheese for a lighter scalloped potato gratin. A healthy holiday side dish!
    Print Recipe
    4.38 from 16 votes

    Scalloped Potato Gratin

    Thinly sliced yukon gold potatoes are baked in a lighter greek yogurt-based creamy sauce and cheese for a lighter, healthier favorite holiday side dish!
    free from: wheat/ gluten, soy, egg, fish, shellfish, tree nuts, peanuts
    Prep Time30 mins
    Cook Time1 hr
    Total Time1 hr 30 mins
    Course: Side Dish
    Cuisine: American
    Servings: 10
    Calories: 136kcal
    Author: Lindsey Janeiro, RDN, CLT

    Ingredients

    • 2 lbs yukon gold potatoes peeled and thinly sliced into rounds no more than ¼" thick
    • 1 tablespoon extra virgin olive oil
    • ¼ medium yellow onion finely chopped or grated
    • 2 garlic cloves finely chopped or grated
    • 1 cup nonfat, plain greek yogurt
    • ½ cup water
    • 1 teaspoon salt
    • ½ teaspoon ground pepper
    • ½ teaspoon dried thyme
    • 1 cup freshly grated cheddar cheese
    • ¼ cup parmesan cheese
    US Customary - Metric

    Instructions

    • Preheat oven to 350 degrees. Prepare a 9x9” baking pan or pie pan by spraying or brushing with a little olive oil.
    • Heat olive oil in a 10-inch skillet over medium heat. Add onion and garlic and saute until translucent.
    • Whisk in ½ cup water, Greek yogurt, and spices. Turn off heat.
    • Layer half the potatoes in the bottom of the baking dish and top with half the creamy yogurt sauce, half the cheese, and all the Parmesan cheese.
    • Repeat with another layer of potatoes, sauce, and cheddar cheese.
    • Bake for 60-75 minutes, until potatoes are fork tender and top is covered in golden brown bubbly cheese.
    • Allow to cool slightly before serving and enjoy!

    Nutrition

    Calories: 136kcal | Carbohydrates: 12g | Protein: 8g | Fat: 5g | Saturated Fat: 3g | Cholesterol: 14mg | Sodium: 361mg | Potassium: 423mg | Fiber: 2g | Vitamin A: 135IU | Vitamin C: 10.7mg | Calcium: 165mg | Iron: 3.1mg
    Thinly sliced yukon gold potatoes baked with a greek yogurt-based cream sauce & cheese for a lighter scalloped potato gratin. A healthy holiday side dish!
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    Reader Interactions

    Comments

    1. Heather in Upland says

      November 09, 2020 at 9:37 pm

      Hello, I was thinking this sort of thing could be done with yogurt so I was pleased to see this recipe. However, I didn't have Greek yogurt; I used plain whole fat yogurt. While it was extremely tasty, the cheese clumped, the yogurt separated, and the bottom of the casserole was watery. There was nothing remotely creamy about it. I wonder if making a cheese sauce with cornstarch and butter would be a better option to keep it from breaking apart. Would the addition of yogurt to such a sauce still cause it to break?

      Input welcome.

      Reply
      • Nikki says

        December 28, 2020 at 8:05 am

        Addition of full fat Greek yogurt would make it creamy. Addition of nonfat yogurts will always cause the sauce to break. Here's why: nonfat yogurts have a higher protein to fat ratio than those with full fat, which makes them more susceptible to breaking, separating, or curdling. When cooked, proteins always firm up -- but since the fats in yogurt surround the proteins, fuller-fat yogurts have more protection from direct heat. If you aren’t going to use full fat yogurt then you might as well do butter, flour/cornstarch, cheese and milk or coffee mate or evaporated milk etc. defeats the purpose of being nutritious though.

        Reply
    2. Shastina says

      November 10, 2020 at 8:49 pm

      I made these because I needed to use up a bag of potatoes. They turned out amazing and my boyfriend loved them too. I will make these again. Thank you so much for providing this recipie. It’s a wonderful option for anyone who would like to use yogurt instead of milk.

      Reply
    3. David Meacheam says

      May 12, 2022 at 6:56 pm

      Please include metric measures and temperatures! 95% of the world population isn't American, and we use Celsius and grams. Including both will only involve a few extra keystrokes on your part and save us non-Americans making conversion calculations.

      Reply
      • Lindsey says

        May 12, 2022 at 9:25 pm

        Hi David. Thanks for bringing this to my attention. There is a button for metric conversion in the recipe card, but it appears to be blocked and not working right now - I'm sending a message now to get that repaired. Thank you.

        Reply
      • Lindsey says

        May 12, 2022 at 9:35 pm

        Okay David, try again now! I believe I've fixed the issue - you should now be able to select "Metric" right under the ingredients. Thank you again for bringing it to my attention, have a nice day/ night (whenever you see this)! 🙂

        Reply

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