Swiss Chard and Sweet Potato Gratin

All the leafy greens in this Swiss chard and sweet potato gratin get mellowed out by bubbly, browned cheese. #swisschard #sweetpotato #vegetarian #entree

i’ve been thinking about perpetuity and continuity. you always have to strive to live healthier, be happier, work harder. it’s hard because there’s no one and done’s; no peace out, i’m finished. unless you’re retired and don’t have to deal with the workforce ever again and spend your days cool as a cucumber, golfing and playing ukelele and nurturing your e-bay selling habit (hi, dad). and it’s annoying in some instances, but also great for second chances. haven’t worked out in a month? it’s okay, walk instead of drive when you go out for ice cream. eat too many cookies today? you can scoop yourself a serving of swiss chard and sweet potato gratin tomorrow. which makes it sound like i’m only into this for the health benefits, when really this gratin is just the free vegetable hug (sometimes there are people who have signs and offer free hugs on campus though they do not offer free vegetables, unfortunately) you need.

if you have wilty greens waiting to be used and you don’t like the taste of them (ie beet greens like the ones photographed here), this is the perfect destination. you don’t get that spinach-y, iron-y aftertaste, and they get suitably buried under the creamy sweet potatoes and melty, golden cheese. this swiss chard and sweet potato gratin is super comforting and cozy, no matter if you’re in blizzard town or in the midst of finals.

1 year ago: Yaki Onigiri, Alton Brown’s Pancakes
2 years ago: Green Tea Mochi Ice Cream, Rant Thursday #2
3 years ago: Mediterranean Baked Chicken, Garlic and Rosemary Infused Penne with Chickpeas

This Swiss chard and sweet potato gratin has tons of veggies, but still has that tender, cheesy vibe that screams comfort food. #swisschard #sweetpotato #vegetarian #entree

Swiss Chard and Sweet Potato Gratin
Prep Time
45 mins
Cook Time
1 hr 30 mins
Total Time
2 hrs 15 mins
This swiss chard and sweet potato gratin is filled with vegetables and cheese, making it a perfectly hearty vegetarian entree worthy for any meal.
Course: Brunch, Dinner, Lunch, Main Course
Cuisine: American, French
Keyword: butter, cheese, egg-free, garlic, gratin, herbs, milk, onion, sweet potatoes, swiss chard, thyme, vegetarian
Servings: 6 people
Calories: 202 kcal
  • 2 T unsalted butter
  • 1/2 large onion finely chopped
  • 1 1/2 lbs Swiss chard leaves and stems separated and both cut into 1" pieces
  • pinch of grated nutmeg
  • 1 cup whole milk
  • 1 garlic clove minced
  • 1 T all-purpose flour
  • 4 medium sweet potatoes peeled and cut into 1/8” thick rounds and tossed with 1/2 tsp salt
  • 1 T minced fresh thyme
  • 1/2 cup coarsely grated cheese ie Gruyére, mozzarella, parmesan, etc
  1. Cook onion in 1 T butter in a pot over moderately low heat, stirring, until softened. Add chard stems and nutmeg; cook, stirring, until vegetables are tender, about 8 minutes. Increase the heat and add the leaves in large handfuls, stirring, until all of the greens are wilted. Season with salt. Transfer the greens to a colander and press out liquid.
  2. Simmer milk and garlic in small saucepan; keep warm. Melt 1 T butter over moderate heat and stir in flour. Cook, whisking, for 1 minute, then slowly whisk in milk and boil, whisking, 1 minute. Season with salt.
  3. Spread half of potatoes in a greased 8x8" baking dish. Sprinkle with some of the herbs and cheese. Distribute half of greens over cheese, then more herbs and cheese over it. Pour half of sauce over then continue with remaining sweet potatoes, herbs, cheese and then greens and herbs. Pour remaining sauce over, pressing vegetables slightly to submerge. Sprinkle with remaining cheese.
  4. Bake at 400F for 1 hour until golden and bubbly, and most of the liquid is absorbed. Let stand 10 minutes before serving.
Recipe Notes

From Smitten Kitchen.

You can sub in 1 tsp dried thyme in place of the fresh thyme. You can sub in other cheeses, but pick something flavorful.

45 Replies to “Swiss Chard and Sweet Potato Gratin”

  1. Second chances are necessary it is too exhausting trying to live right all the time haha. I ate too many cookies yesterday so I need this now please and thank you! I am loving all that golden melty cheese 🙂

    1. the real question is, what kind of cookies? 😉 and i feel you on that golden melty cheese; i’m convinced it makes everything better.

  2. This looks so good! I’ll have to try it myself 😀

  3. Sounds deliciously comforting! I love both swiss chard and sweet potato so the two together sounds divine! Plus, with cheese on top? How can you go wrong 🙂 ? It’s the first day of spring, but totally snowing here so this would be perfect right about now!

    1. well, hopefully you can get in some spring skiing (if you’re into that kind of thing)? but this would definitely be perfect then (:

  4. Ummmmm I really need a vegetable hug right now! This looks and sounds so phenomenal I can’t even stand it. Sweet potatoes are one of my favorite things adding cheese and some greens? Yeah, this is gonna happen soon.

    1. can we all get vegetable hugs? i got some free kale from a community garden last week and that was a pretty solid one, but i’d be down for more vegetable hugs (;

  5. As much as I would LOVE to retire and just stay-cation it for the rest of my life, I feel like I would get bored. If we aren’t striving towards something, whether it be a personal or professional goal, what are we here for? Ya know? But I’m also a type A personality with a moderate to severe case of OCD. Sooo? 😉 Anyways, LOVE this gratin! Seriously, potato gratins are my weakness, so this cheesy, swiss chardy goodness is SCREAMING my name! Cheers, girl!

    1. at the moment i’d love to say that i’m ready to do nothing for the forseeable future, but i think it’s a grass is always greener on the other side (it’s finals week so everyone is stressed and sleep deprived and in crisis mode) deal. i’d be so bored and restless. (i’m also a type a who love lists and research lol).

  6. Oh man, this sounds so so good. Perfect dish for today – I do love sweet potatoes and chard is one of my fave greens for cooking, too! Thanks for the recipe, I will Pin it.

    1. swiss chard is so tasty, no matter if it’s just sauteed with a bit of garlic or put into something a bit more involved like this gratin. i love how sweet and tender the stems get!

  7. EVERYTHING and I mean EVERYTHING is better with sweet potatoes. SERIOUSLY! I love those suckers SO SO SO SO SO much!

    1. same!! normally i do sweet potatoes mashed with a bit of maple syrup, butter and walnuts, but this is a really tasty way to make it savory (:

  8. I’m all for second and third chances hehehe. Loving all the veggies in this gratin! Must try for sure! XOXO

    1. good thing third chances are a thing, too (: thanks, kelly!

  9. Yumm! I love enjoying sweet potatoes in a savory way and this looks perfect!

    1. do you have any other ways you like to use sweet potatoes in a savory setting? i usually make them sweet, but i love them every which way, and would love to experiment (:

  10. Yum!
    Izzy | Pinch of delight

  11. This looks amazing! I love how sweet potatoes can go sweet or savory!!! I’d love goat cheese with this!!

    1. oooh goat cheese would be amazing! any cheese works, though i prefer something stronger than mozzarella, and goat cheese definitely falls in that category. in the one photographed here, i used a mix of feta, parm and mozzarella, which was (shocking, i know; when is cheese not tasty?!) pretty delicious.

  12. We need to always strive to better ourselves and just keep going! Great reminder, Heather! Sweet potatoes and Swiss chard sound so amazing together with the cheese! It looks so delicious and filling!

    1. just keep swimming 🐟

  13. I just stuffed my face with a massive piece of sheet cake, but no apologies here! I often have soft Spinach and Kale in my fridge. Like the idea of using wilty greens in this Gratin form.

    1. mmmm sheet cake is so worth it though! (: and wilty greens would definitely be good here; it gets all tender and cheesy, and how could that be bad?!

  14. OMG, how did you know I love swiss chard and sweet potatoes and Potato AuGratin is one of my favorite treats. It seems like this post is just for me so THANK YOU THANK YOU THANK YOU!

    1. not quite like potato au gratin (that’s a bit creamier and cheesier 😉 very delicious though, i agree), though tasty in its own way! also, you’re welcome!!

  15. I love swiss chard and love how creatively you used it here.
    I’d never have thought of that.
    Thanks so mcuh for sharing 🙂

    1. thanks, kimberly! i really love chard too (and was probably in the minority of kids who didn’t mind chard when my mom served it, lol), and it’s so tasty in this (:

  16. I pretty much always have wilty greens in my fridge that need to be used. Now, I have the perfect recipe for them! Ooey, gooey cheesy goodness! Yum! Can’t wait to try this!

    1. perfect! and i agree on how great ooey, gooey cheesy goodness is 😋

  17. I find three of my favorites in this recipe – smittenkitchen, swiss chard and sweet potatoes! Sweet potatoes are such a versatile and one of the most delicious things that ever grows under ground and I can eat them 3 times a day if possible. Can’t wait to try this:)

    1. ahh i love smitten kitchen!! if i could bake/cook with deb or ina garten or melissa clark, i’d be a happy camper.

  18. That looks phenomenally delicious!! Great share!!! <3 –

    1. thanks gingi! phenomenally sounds like a good descriptor for this 😋

  19. a free vegetable hug?!? count me in!! and I don’t use swiss chard enough (actually, let’s be honest – i’ve never used it..) so I feel like that needs to change!

    1. you should try using swiss chard!! it’s pretty sweet tasting, and is as easy to use as any other leafy green (:

  20. Yummy! I love this dish! I will definitely give it a try, Heather!

    1. thanks, agness! 🍠 (also, probably not surprising, but there’s no swiss chard emoji, lol).

  21. Veggie hugs are more than welcome here. Now that it’s warmer weather here I can only see more grilling and meats in my near future. Really need to figure out a balance.
    Isn’t it funny that no one really prepares you these feelings of life? Half the time I have no clue how people do it… almost every other day I feel like I can barely get by. haha.

    1. grilling intimidates me! i love the smoky flavor you get, but the lack of heat control makes me wary. i really should get more into it though, because using the oven during summer isn’t the most fun.

  22. You have an incredible way of making the healthiest of plates look delicious filling and mouthwatering, Heather. I can’t say that I would love to eat healthy every day but if my plates looked more like the ones you make I wouldn’t shy away from it whatsoever!

    1. i think the only way i’d be able to eat healthy all the time is if i didn’t care about food. if it all tasted the same to me, then why not live off of kale, spirulina and hemp seeds? i don’t think that’s in my future though 😉

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