Pinterest Image is the kind of dish that photographs well and eats better. It bakes in one pan, holds its shape when sliced, and needs no last-minute work.
I weigh everything, including the salt. Volume measures drift by ten percent or more, and this dish punishes drift with a soggy center (the starch-to-liquid ratio is the whole structure).
Read the steps once, set your oven, and start. The cues matter more than the clock.
Why You'll Love This Recipe
About the Ingredients
700 g (about 4 cups) peeled potatoes, cut into 1 cm slices
Waxy varieties like Yukon Gold hold shape; russets turn mealy. Substitute parboiled cauliflower florets if you want it lower in starch.
200 g (1 1/2 cups) grated Gruyère
Buy a block and grate it yourself; pre-shredded cheese is coated in starch and melts grainy. Emmental or aged cheddar substitute cleanly.
150 g (1 cup) finely diced yellow onion
Yellow onion gives the sweetest cooked result. Substitute leek whites for a milder, greener flavor.
250 ml (1 cup) whole milk
Whole milk carries the fat that keeps the custard smooth. Substitute oat milk for a dairy-free version; expect a thinner set.
200 ml (3/4 cup plus 1 tablespoon) heavy cream, 36% fat
Higher-fat cream sets firmer. Do not substitute half-and-half; the custard will not hold a slice.
3 large eggs (about 150 g without shells), beaten
Room-temperature eggs emulsify better. Pull them from the fridge thirty minutes ahead, or rest them in warm water for five minutes.
20 g (1 1/2 tablespoons) unsalted butter, softened
Soft butter spreads evenly for greasing. Substitute a neutral oil spray if you prefer.
8 g (1 1/4 teaspoons) fine sea salt
Fine sea salt dissolves evenly. If using kosher salt, use 10 g; the crystals are larger and less dense.
2 g (1/2 teaspoon) freshly ground black pepper
Grind to order; pre-ground pepper is mostly dust. Add a pinch of nutmeg here if you like a warmer profile.
15 g (2 tablespoons) fresh breadcrumbs
Stale sourdough pulsed in a processor gives the crispest top. Substitute panko for a lighter crunch.
Tips & Tricks
Slice the potatoes evenly
Uneven slices cook at different rates, so the thin ones dissolve and the thick ones stay raw. Use a mandoline set to 1 cm or weigh each slice group.
Salt the custard, not the top
Salt mixed into the egg and cream seasons every bite; salt sprinkled on top pulls moisture and dulls the crust.
Bake on the middle rack
Too high and the crumbs scorch before the center sets. Too low and the base burns before the top browns.
Pro Tips
Step-by-Step Instructions
1. Heat the oven
Set the oven to 190°C (375°F) and place a rack in the middle. (A stable middle-rack temperature browns the top and base at the same rate.)
2. Parboil the potatoes
Boil the sliced potatoes in salted water for 4 minutes, then drain and cool for 5 minutes. (Partial cooking releases starch that thickens the custard.) The edges should look translucent but the centers still firm.
3. Grease the dish
Rub a 23 by 33 cm (9 by 13 inch) baking dish with the 20 g butter, covering corners. (Bare corners weld the potatoes to the glass.) The surface should look glossy with no dry patches.
4. Layer the base
Arrange half the potatoes in an even layer, then scatter half the onion and half the Gruyère. (Even layers keep the slice from collapsing on one side.) Repeat with the remaining potatoes, onion, and cheese.
5. Whisk the custard
Whisk the 3 eggs, 250 ml milk, 200 ml cream, 8 g salt, and 2 g pepper until uniform. (Over-whisking adds foam that bakes into pockets.) Stop when no streaks of yolk remain.
6. Pour and press
Pour the custard over the layers and press the potatoes down with a spatula. (Pressing pushes liquid between slices so nothing bakes dry.) The liquid should sit just below the top layer.
7. Add the crumb top
Scatter the 15 g breadcrumbs over the surface in a thin, even coat. (A thick coat insulates the custard and slows the set.) The top should look speckled, not blanketed.
8. Bake until set
Bake at 190°C (375°F) for 35 minutes, until the edges bubble and the top is golden brown. (The bubbling edge shows the custard has reached a rolling simmer.) A center thermometer should read 82°C (180°F).
9. Rest before slicing
Cool in the dish for 10 minutes, then cut into six portions. (Resting lets the starch network finish setting.) A knife should slide through with no liquid trailing.
Delicious Variations
Ham and Gruyère
Layer 120 g diced cooked ham between the potato layers and reduce the salt to 6 g.
Smoked Paprika Version
Add 3 g smoked paprika to the custard and swap the Gruyère for smoked cheddar.
Mushroom and Thyme
Sauté 200 g sliced mushrooms until dry, then layer them with 2 g fresh thyme leaves.
How to Store Pinterest Image
Refrigerator
Cover and refrigerate up to 4 days; reheat portions covered at 180°C (350°F) for 12 minutes.
Freezer
Freeze cooled portions wrapped tightly for up to 2 months; thaw overnight in the refrigerator before reheating.
Reheating
Reheat covered at 180°C (350°F) for 12 to 15 minutes, until the center reads 74°C (165°F).
Frequently Asked Questions
Q: Why is my Pinterest image bake watery?
The custard was underbaked or the potatoes were wet when layered. Drain the potatoes well after parboiling and bake until the center reads 82°C (180°F).
Q: Can I make this dish ahead of time?
Yes, assemble it up to 24 hours ahead and refrigerate covered. Bake it cold and add 8 minutes to the time, checking the center temperature.
Q: Can I use low-fat milk instead of cream?
Yes, but the set will be softer and the slice may slump. Replace no more than half the cream with whole milk and add 10 g breadcrumbs to absorb moisture.
Q: What potatoes work best for this recipe?
Waxy potatoes such as Yukon Gold hold their shape and slice cleanly. Russets absorb liquid and turn to mash, which makes the base dense.
Q: How do I know when the dish is fully baked?
The edges bubble steadily and the top is golden brown. Confirm with a thermometer: the center should read 82°C (180°F).
Weigh the ingredients, watch the cues, and bake it once. Then tell me how your family handled the second helping.
Pinterest Image
Pinterest Image is a golden, bubbling baked dish that feeds a crowd from one pan, with a crisp top and a creamy, savory center every time.
🧂 Ingredients
- 700 g (about 4 cups) peeled potatoes, cut into 1 cm slices
- 200 g (1 1/2 cups) grated Gruyère
- 150 g (1 cup) finely diced yellow onion
- 250 ml (1 cup) whole milk
- 200 ml (3/4 cup plus 1 tablespoon) heavy cream, 36% fat
- 3 large eggs (about 150 g without shells), beaten
- 20 g (1 1/2 tablespoons) unsalted butter, softened
- 8 g (1 1/4 teaspoons) fine sea salt
- 2 g (1/2 teaspoon) freshly ground black pepper
- 15 g (2 tablespoons) fresh breadcrumbs
📋 Instructions
- 1Heat the oven — Set the oven to 190°C (375°F) and place a rack in the middle. (A stable middle-rack temperature browns the top and base at the same rate.)
- 2Parboil the potatoes — Boil the sliced potatoes in salted water for 4 minutes, then drain and cool for 5 minutes. (Partial cooking releases starch that thickens the custard.) The edges should look translucent but the centers still firm.
- 3Grease the dish — Rub a 23 by 33 cm (9 by 13 inch) baking dish with the 20 g butter, covering corners. (Bare corners weld the potatoes to the glass.) The surface should look glossy with no dry patches.
- 4Layer the base — Arrange half the potatoes in an even layer, then scatter half the onion and half the Gruyère. (Even layers keep the slice from collapsing on one side.) Repeat with the remaining potatoes, onion, and cheese.
- 5Whisk the custard — Whisk the 3 eggs, 250 ml milk, 200 ml cream, 8 g salt, and 2 g pepper until uniform. (Over-whisking adds foam that bakes into pockets.) Stop when no streaks of yolk remain.
- 6Pour and press — Pour the custard over the layers and press the potatoes down with a spatula. (Pressing pushes liquid between slices so nothing bakes dry.) The liquid should sit just below the top layer.
- 7Add the crumb top — Scatter the 15 g breadcrumbs over the surface in a thin, even coat. (A thick coat insulates the custard and slows the set.) The top should look speckled, not blanketed.
- 8Bake until set — Bake at 190°C (375°F) for 35 minutes, until the edges bubble and the top is golden brown. (The bubbling edge shows the custard has reached a rolling simmer.) A center thermometer should read 82°C (180°F).
- 9Rest before slicing — Cool in the dish for 10 minutes, then cut into six portions. (Resting lets the starch network finish setting.) A knife should slide through with no liquid trailing.
Tomasz writes precise, method-first recipes for breads, ferments, and slow braises, drawing on Polish and Central European home cooking. He cares about weights, temperatures, and timing, and explains the reason behind each step so cooks can repeat results. His angle is turning fussy techniques into clear, checkable instructions.
