A lower-calorie way to make Tuna Casserole
Tuna Casserole turns creamy with browned mushrooms and milk—not canned soup
Tuna, peas, browned mushrooms and a light milk sauce make a creamy, crisp-topped noodle casserole for about 465 calories per serving.
The familiar casserole texture does not require two cans of condensed soup. Mushrooms are browned until their water is gone, then flour is cooked in the same pan and loosened gradually with milk. That savory base coats a measured amount of noodles instead of flooding them. A shallow baking dish exposes more surface, so a small breadcrumb portion gives every scoop some crunch.
What changes—and what stays
From usually 600–850 calories with condensed soup, cheese and a thick crumb layer to 465 calories
Replace condensed soup with mushrooms and 2% milk, use 60 grams dry noodles per person, and spread 45 grams breadcrumbs over a shallow dish. Dark mushroom edges provide savory depth, Dijon and lemon brighten the tuna, and toasted crumbs concentrate crunch on the surface. The sauce stays creamy because noodles finish cooking in it.
| Part | Conventional | Lighter | Why |
|---|---|---|---|
| Core method | More added fat or a heavier proportion | Replace condensed soup with mushrooms and 2% milk, use 60 grams dry noodles per person, and spread 45 grams breadcrumbs over a shallow dish | Dark mushroom edges provide savory depth, Dijon and lemon brighten the tuna, and toasted crumbs concentrate crunch on the surface. The sauce stays creamy because noodles finish cooking in it. |
How the flavor stays
Dark mushroom edges provide savory depth, Dijon and lemon brighten the tuna, and toasted crumbs concentrate crunch on the surface. The sauce stays creamy because noodles finish cooking in it.
A cost rule that survives inflation
Canned tuna, frozen peas and ordinary milk are durable staples. Making the sauce in the skillet avoids buying condensed soup while mushrooms stretch the protein across six portions.
Ingredients for 6
Measure first; timing is part of how this recipe uses less fat.
- 360 gdry egg noodles
- 500 gcanned tuna in water— drained
- 450 gmushrooms
- 300 gfrozen peas
- 750 ml2% milk
- 45 gall-purpose flour
- 20 golive oil
- 45 gpanko breadcrumbs
- 20 gDijon mustard
- 15 mllemon juice
Method
Each step includes heat, a visible cue, and a recovery.
Step 1 · follow the visible cue
Stop the noodles while the center is still firm
Boil noodles for two minutes less than the package directs, drain without rinsing, and spread them on a tray so carryover cooking slows.
Look for: A cut noodle should show a narrow pale center and feel noticeably firmer than ready-to-eat pasta.
Step 2 · follow the visible cue
Brown mushroom water away before making sauce
Cook sliced mushrooms in a wide dry skillet in two batches. Add oil and flour only after the mushrooms have browned and no liquid remains.
Look for: Mushroom edges should be dark and the flour should smell nutty without taking on black spots.
Step 3 · follow the visible cue
Add milk slowly and fold tuna only once
Whisk milk into the flour in four additions, simmer until it coats a spoon, then stir in mustard and lemon. Fold in noodles, peas and large tuna flakes.
Look for: Sauce should sit between the noodles, while tuna remains in visible flakes instead of disappearing.
Step 4 · follow the visible cue
Choose a shallow pan for more crunch per crumb
Transfer to a shallow dish, scatter breadcrumbs mixed with a few drops of oil, and bake at 425°F for fifteen minutes.
Look for: The center should bubble and the thin breadcrumb layer should be evenly golden, not pale and thick.
Calories at the same serving size
209 kcal · 31% lower estimated
The estimate uses the listed ingredients divided into 6 servings. Brand labels, trimming, and the amount left in the pan can change the result.
Keep the leftovers in the same spirit
Refrigerate for up to three days. Reheat covered until hot, then uncover briefly to dry the crumb topping; add milk by the spoonful only if needed.
Refrigerate for up to three days. Reheat covered until hot, then uncover briefly to dry the crumb topping; add milk by the spoonful only if needed.
Frequently asked questions
Can I use canned salmon instead of tuna?
Yes. Drain it well, remove any skin if preferred and keep the flakes large when folding them into the sauce.
Why does the estimate not include cheese?
The browned mushrooms, mustard and crisp topping supply the savory notes here. If you add cheese, calculate that amount separately.
CaloNote · mobile analysis example
Check the Tuna Casserole serving you actually made
Photograph the finished plate in CaloNote, review the detected ingredients and portion, and correct the estimate before saving.
This uses the real CaloNote meal-detail layout with this recipe’s photo and estimated nutrition. Actual AI results vary with the photo and portion.
Analyze my meal in CaloNoteMethod and sources
Recipe development and nutrition review: CaloNote Editorial
This editorial recipe uses ingredient-level nutrition estimates and reviewed cooking principles. It is not represented as physically test-cooked, and nutrition is approximate.
Published and last reviewed: August 25, 2026
Make another familiar dinner lighter
Hoppin' John balances black-eyed peas, greens and brown rice
Black-eyed peas, brown rice, collard greens and a little smoked turkey make a savory Hoppin' John bowl for about 455 calories.
See the recipe
Red Beans and Rice turn creamy from mashed beans, not sausage fat
Creamy red beans, vegetables and a modest amount of chicken sausage served over brown rice make a 480-calorie Louisiana-style bowl.
See the recipe