A lower-calorie way to make Scalloped Potatoes
Scalloped Potatoes turn silky with a thin milk sauce
Thin potato and onion layers bake in a light thyme milk sauce with a modest cheddar finish for about 350 calories per serving.
Scalloped potatoes need enough liquid to cook every slice, but they do not need heavy cream between every layer. Waxy potatoes are sliced evenly and coated in a lightly thickened milk sauce before they enter the dish. A covered first bake traps steam; uncovering only at the end reduces the sauce and browns a measured cheddar top.
What changes—and what stays
From often 500–700 calories with cream, butter and abundant cheese to 350 calories
Use two-percent milk thickened with flour and reserve only 120 grams of cheddar for the browned surface. Thyme, garlic and browned onion season the milk while thin, even potato slices release enough starch to make the finished sauce feel rich.
| Part | Conventional | Lighter | Why |
|---|---|---|---|
| Core method | More added fat or a heavier proportion | Use two-percent milk thickened with flour and reserve only 120 grams of cheddar for the browned surface | Thyme, garlic and browned onion season the milk while thin, even potato slices release enough starch to make the finished sauce feel rich. |
How the flavor stays
Thyme, garlic and browned onion season the milk while thin, even potato slices release enough starch to make the finished sauce feel rich.
A cost rule that survives inflation
Potatoes, onions and milk make six substantial portions from basic Canadian staples, while aged cheddar supplies more flavour in a smaller amount.
Ingredients for 6
Measure first; timing is part of how this recipe uses less fat.
- 1.2 kgyellow potatoes
- 300 gonion
- 700 ml2% milk
- 35 gall-purpose flour
- 120 gaged cheddar
- 12 gcanola oil
- 8 ggarlic
- 5 gfresh thyme
Method
Each step includes heat, a visible cue, and a recovery.
Step 1 · follow the visible cue
Slice every potato to the same thickness
Cut potatoes into three-millimetre rounds and keep them covered while slicing the onion equally thin.
Look for: The potato rounds should bend slightly and stack without obvious thick or thin outliers.
Step 2 · follow the visible cue
Thicken milk only enough to coat
Soften onion and garlic in measured oil, stir in flour, then whisk in warm milk and thyme until lightly thickened.
Look for: The sauce should leave a translucent film on a spoon rather than sitting like paste.
Step 3 · follow the visible cue
Coat the slices before layering
Fold potatoes through the warm sauce, then arrange them in an even shallow dish and pour every remaining drop around the edges.
Look for: All exposed potato surfaces should look glossy with no dry flour pockets or deep liquid pool.
Step 4 · follow the visible cue
Cover to cook and uncover to brown
Bake covered at 375°F for fifty minutes, uncover, add cheddar and bake until a knife slips through the centre.
Look for: The centre should be tender, the sauce no longer runny and the cheese top spotted gold.
Calories at the same serving size
158 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 four days. Reheat covered until hot, then uncover briefly to restore the browned surface without drying the edges.
Refrigerate for four days. Reheat covered until hot, then uncover briefly to restore the browned surface without drying the edges.
Frequently asked questions
Why are my potatoes still firm?
Slices were too thick, the sauce was cold, or the covered baking stage ended before steam softened the centre.
Can I prepare the dish ahead?
Bake it through, cool and refrigerate; reheating an assembled raw dish can discolour the potatoes and lengthen cooking unpredictably.
- yellow potatoes1.2 kg
- onion300 g
- 2% milk700 ml
- all-purpose flour35 g
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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
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