Summary:
This is a simple 6-ingredient recipe for a low carb tuna casserole with broccoli, cheddar cheese, and ranch dressing. It has a creamy and cheesy texture, with a distinct but not overpowering tuna taste.

INGREDIENTS
- 5-ounce can solid albacore tuna (Note 1)
- 6 cups small broccoli florets (Note 2)
- 1.75 cups shredded cheddar cheese (Note 3)
- 1 cup frozen green peas
- 1 cup ranch dressing (store-bought or homemade dressing)
- 1/4 cup finely grated parmesan cheese (Note 4)
INSTRUCTIONS
- Prepare: Preheat oven to 375 F. Cut any broccoli florets larger than 2 inches into smaller pieces, and add all broccoli to large microwave-safe bowl. Cover and microwave until tender, about 5 minutes, then drain and steam out on paper towels. Drain can of tuna, then pat surface dry with paper towels. Flake tuna with fork until there are no large chunks.
- Assemble Casserole: Directly in
8×8 inch baking dish (Note 5), add broccoli, tuna, peas, ranch dressing, and half of cheddar cheese, carefully stirring together until well-mixed. Evenly top with remaining cheddar cheese, then sprinkle with parmesan cheese. - Bake & Cool: Bake at 375 F until heated through and starting to brown on top, about 25 minutes. Let rest for about 5 minutes until bubbling subsides before cutting. Serve (Note 6).
NUTRITION
Makes 4 Servings |
Amount Per Serving: |
Calories 510 (75% from fat) | ย |
Total Fat 42g | 65% |
ย ย ย Saturated Fat 13g | 64% |
Cholesterol 59mg | 20% |
Sodium 1240mg | 52% |
Net Carb 6g | ย |
Total Carb 9.5g | 3% |
ย ย ย Dietary Fiber 3.5g | 15% |
ย ย ย Sugars 4.5g | ย |
Protein 23g | ย |
PHOTOS




Made this a couple of times since I love tuna casseroles but needed an alternative to rice and noodles. I have added more veggies when I have extra, and sometimes use different cheeses. Oh, and I’ve made small portions of it in the microwave and it’s very yummy.
This was outstanding.
I added celery, onions and frozen peas and carrots and 4 small cans of tuna. . For cheeses I used mozzarella and cheddar with bottled ranch dressing. Soooo very delicious! Definitely a remake. Thank you for your recipe.
Well it’s not exactly tuna casserole satisfying but it’s so simple to make and hits the spot as a low carb meal option. I’m making it again, right now so it’s a keeper!
Made it tonight, was super delightful. Will make again for sure!
Are Peas Keto friendly though?
All ingredients, including peas, are included in the nutrition estimate. With 6g net carbs per serving, I would definitely consider it to be keto friendly.
If you’re worried about it, or want to reduce the carbs a bit more, substitute frozen shelled edamame for the peas! I did that because I had them on hand, and it was perfect!
Made this tonight. It was delicious! Better than I expected for a tuna casserole.
So simple and so good. I made the fantastic homemade ranch dressing. This recipe is definitely a keeper! Added some hot sauce on top. Yum.
Husband loved this. Super easy and delish.
Enjoyed the taste. No way this is four servings though. My husband and I ate it all. Adding some whole grain noodles next time. Going more plant-based rather than Keto.
quinoa or brown rice would be more “plant based”. I also think this this would be great with riced broccoli and cauliflower for us keto peeps.
This is so delicious, easy to make- love it. And I am not a fan of broccoli! Will make this again for sure! Thank you for sharing your recipes. ๐ I love getting them each week in my email.
Liked this for its simplicity.
Delicious and simple!