Kalyn's Kitchen

Broccoli Gratin (VIDEO)

This low-carb Broccoli Gratin combines Swiss and Parmesan cheese for a delicious side dish for a special meal. 

PIN Low-Carb Broccoli Gratin try it later.

Broccoli Gratin finished dish in baking dish.

Through the years there have been some definite Thanksgiving side dish favorites on the blog, and this low-carb Broccoli Gratin with Swiss and Parmesan cheese is a dish I’ve made over and over for Thanksgiving, which makes it perfect to feature for Friday Favorites this week. And Thanksgiving is all about the side dishes, right?

The recipe was adapted from one I saw in A Pinch of Salt Lake, a book published by the Junior League of Salt Lake, and I love this cheesy  low-carb and Keto broccoli side dish that’s definitely fresher-tasting and lower in carbs than the canned soup version of Broccoli with Cheese Sauce that quite a few people in my family still like.

Broccoli Gratin is Keto, low-carb, and gluten-free, and if you’re looking for a more carb-conscious vegetable option for Thanksgiving, I think this recipe is perfect. Check out The BEST Low-Carb and Gluten-Free Thanksgiving Side Dishes or Low-Carb and Keto Broccoli Side Dishes if you’d like more ideas. And if you really like broccoli, look after the recipe for a few more ideas for Thanksgiving-worthy broccoli, enjoy!

Low-Carb Broccoli Gratin with Swiss and Parmesan process shots collage

Easy Instructions for Broccoli Gratin:

(Scroll down for complete printable recipe.)

  1. Blanch the broccoli just two minutes minutes in boiling salted water, then drain well.
  2. Mix together grated Swiss cheese, mayo, lemon juice, Dijon, and finely chopped green onion to make the cheese topping.
  3. Put drained broccoli in a low-sided glass or crockery casserole dish, then spread the cheese topping over the top.
  4. Sprinkle the finely grated parmesan over the top.
  5. Bake about 30 minutes, or a little longer if you like it well-browned like I do. Serve hot.
  6. I hope this will become a Thanksgiving tradition in your family like it is for mine!

Low-Carb Broccoli Gratin with Swiss and Parmesan close-up photo

More Ideas for Low-Carb Thanksgiving Broccoli

Roasted Broccoli with Soy Sauce and Sesame Seeds from Kalyn’s Kitchen
Barely Blanched Broccoli Salad with Feta and Fried Almonds ~ Kalyn’s Kitchen
Roasted Broccoli with Garlic from Kalyn’s Kitchen

More Low-Carb Thanksgiving Recipes:

25+ Low-Carb and Gluten Free Holiday Side Dishes, Appetizers, and Salads
The BEST Low Carb and Gluten-Free Thanksgiving Side Dishes
Ten Favorite Low-Carb Green Vegetable Recipes

Low-Carb Broccoli Gratin with Swiss and Parmesan close-up photo

Broccoli Gratin

Yield Makes 8 servings
Prep Time 15 minutes
Cook Time 32 minutes
Total Time 47 minutes

This Broccoli Gratin with Swiss and Parmesan cheese is a great option for a an easy and delicious Thanksgiving side dish.


  • 8 cups bite-size broccoli flowerets
  • 1 1/2 cups finely grated Swiss cheese
  • 8 T mayo
  • 1 1/2 T fresh squeezed lemon juice
  • 3/4 tsp. Dijon mustard
  • fresh ground black pepper to taste
  • 3 T finely chopped green onions
  • 1/4 cup finely grated Parmesan cheese


  1. Preheat oven to 375F.
  2. Bring large pot of salted water to a boil while you trim broccoli and cut into small flowerets. (I leave on a fair amount of the stem, but if stems are thick I recommend peeling some of the stem with a vegetable peeler.)
  3. When water starts to boil, put broccoli in and cook exactly 2 minutes (just until the broccoli turns bright green.)
  4. Immediately dump broccoli into a colander placed in the sink and let drain well.
  5. Spray a low-sided glass or crockery casserole dish with non-stick spray or olive oil.
  6. Put broccoli in casserole dish, spreading out into close to a single layer.
  7. Stir together mayo, lemon juice, Dijon mustard and black pepper, then mix in finely chopped green onion and finely grated Swiss cheese.
  8. Spread mayo-cheese mixture over the top of broccoli (I used a rubber scraper to do this. This is not a sauce that will completely cover the broccoli, but a thin layer of cheese sauce on the top.)
  9. Sprinkle parmesan cheese over mayo-cheese mixture.
  10. On Thanksgiving Day, this could be made ahead up to this point and kept in the refrigerator. Let come to room temperature before baking.
  11. Bake uncovered for about 30 minutes, or until cheese is melted and slightly browned on top. (I baked the broccoli gratin in the photos for exactly 32 minutes.
  12. Serve hot.


This recipe adapted slightly from A Pinch of Salt Lake.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 241Total Fat: 18gSaturated Fat: 6gUnsaturated Fat: 11gCholesterol: 27mgSodium: 235mgCarbohydrates: 8gFiber: 5gSugar: 3gProtein: 10g

Nutrition information is automatically calculated by the Recipe Plug-In I am using. I am not a nutritionist and cannot guarantee 100% accuracy, since many variables affect those calculations.

If you make this recipe I'd love to hear how it turns out. Leave a star rating or share on social media with the hashtag #KALYNSKITCHEN, thanks!

Low-Carb Broccoli Gratin with Swiss and Parmesan thumbnail image

Low-Carb Diet / Low-Glycemic Diet / South Beach Diet Suggestions:
All the ingredients in this Low-Carb Broccoli Gratin with Swiss and Parmesan are low-carb foods, making this a better choice for low-carb diets than many traditional Thanksgiving vegetable dishes. This recipe is relatively high in fat which won’t matter to many low-carb eaters, but if you’re following The South Beach Diet, it’s probably a “once-in-a-while treat”.

Find More Recipes Like This One:
Use Thanksgiving Recipes for more Thanksgiving ideas. Use the Recipes by Diet Type photo index pages to find more recipes suitable for a specific eating plan.

Pinterest image of Broccoli Gratin

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    100 Comments on “Broccoli Gratin (VIDEO)”

  1. I used frozen broccoli and sharp cheddar. I could eat this every night it was that good.

  2. So good!! I could eat the whole thing myself!

  3. Thanks for the reply! That sounds like good advice. I’ll try it and let you know!