Is canned tuna ok for a keto diet?

Yes, canned tuna is perfect for a keto diet. It’s high in protein, low in carbs, and has zero sugar. Choose tuna packed in water or olive oil. Avoid flavored versions, as they may contain added sugars or carbs. Canned tuna makes keto tuna casserole easy, affordable, and ideal for meal prep.

Is tuna casserole keto?

Traditional tuna casseroles are not keto because they use pasta or bread crumbs. A proper keto tuna casserole uses low-carb ingredients like cabbage, zucchini noodles, or cauliflower. It replaces flour-based thickeners with cream, cheese, or egg yolk. This keeps the carb count low while preserving comfort food flavor.

How many carbs are in a tuna casserole?

A traditional tuna casserole can have over 20 grams of carbs per serving. In contrast, a well-made keto tuna casserole usually contains just 6 to 8 net carbs. Using low-carb vegetables, heavy cream, and full-fat cheese helps keep it keto-compliant.

How do you thicken a keto casserole?

Skip flour and cornstarch. Use cream cheese, shredded cheese, or a pinch of xanthan gum. These thickeners blend well and keep carbs low. Simmering your sauce before baking also helps get the perfect texture in your keto tuna casserole .

Is tuna mayo good for keto?

Yes, if you use real mayonnaise made with olive oil or avocado oil. Tuna mixed with mayo makes a quick, easy keto snack. You can even add this mix into your keto tuna casserole for extra creaminess. Just make sure the mayo has no added sugars.

Keto Tuna Casserole: The Best Low-Carb Comfort Food Recipe (2025)

Description

Keto tuna casserole is a creamy, cheesy, and low-carb comfort food loaded with tuna, cabbage, cream, and cheese. It’s perfect for meal prep and fits right into a ketogenic lifestyle.

Ingredients

Scale

3 cans albacore tuna in water, drained

1 medium head green cabbage, shredded

1 cup heavy cream

1½ cups shredded cheddar or parmesan cheese

1 tbsp lemon juice

1 tsp garlic powder

1 tsp dried dill

Salt and pepper to taste

2 tbsp olive oil or butter

Cook Mode Prevent your screen from going dark

Instructions

1. Preheat oven to 375°F.

2. Sauté cabbage, garlic, and onions in olive oil or butter until soft.

3. In a bowl, mix heavy cream, lemon juice, dill, garlic powder, salt, and pepper.

4. Stir in shredded cheese until melted.

5. Add tuna and mix well.

6. Transfer to a baking dish and top with more cheese.

7. Bake for 20 minutes until golden and bubbly.

Notes

Store leftovers in the fridge for up to 3 days.

Freeze before baking for best texture. Thaw overnight before reheating.

Add jalapeños or crushed pork rinds for extra flavor or crunch.

Prep Time: 15 minutes
Cook Time: 30 minutes
Category: Dinner
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 portion
Calories: 350
Sugar: 2g
Sodium: 580mg
Fat: 25g
Saturated Fat: 14g
Unsaturated Fat: 9g
Trans Fat: 0g
Carbohydrates: 7g
Fiber: 2g
Protein: 22g
Cholesterol: 85mg