Turn the oven to 200 °C, convection if you have it.
Peel and slice
Peel the 0.4 kg of potatoes and cut them into thin 3 mm rounds. Crush 1 garlic clove and mince it finely, keep the second one for the chicken.
Tip · Cut the rounds the same thickness and don't rinse the potatoes, the starch helps bind the gratin.
Make the sauce
Melt 5 g of butter in the saucepan, add the flour and stir for 1 min. Pour in the milk and cream, add salt, pepper and the minced garlic and bring to a simmer, stirring, until the sauce thickens a little.
Build and bake the gratin
Butter the dish with the remaining 5 g of butter, spread out the rounds, pour the sauce over and toss to coat well. Bake at 200 °C for 50 min total.
Season the chicken
Crush the second garlic clove and rub the 4 thighs with the garlic, thyme, salt and pepper.
Brown the thighs
Heat the skillet with a drizzle of oil and brown the thighs for 4 to 5 min per side, skin side first, until nicely golden.
Roast the chicken
Lay the thighs on the baking sheet and slide them into the oven next to the gratin, 25 min at 200 °C. The juices should run clear and the center hit 74 °C.
Tip · If the skin browns too fast, cover the thighs with foil, and if the juices are still pink, give them 5 more min.
Check and serve
Poke a thigh near the bone: the juices should run clear. The potatoes should be golden and tender when poked with a knife. Let it rest 5 min and serve.
And there you go, it's readyCheck off every step to celebrate.
The questions you're asking
short answers, numbers you can check
How many calories in a serving?
One serving has about 841 kcal. 18% comes from carbs, 26% from protein and 54% from fat.
37 gCarbs
55 gProtein
51 gFat
Per serving (the dish for 2, divided by 2)
Energy
841 kcal
Protein
54.6 g
Carbs
37 g
of which sugars
3.4 g
Fat
50.8 g
of which saturated fat
19.5 g
Fiber
5.2 g
Salt
0.7 g
Worked out ingredient by ingredient with the ANSES Ciqual 2025 table, never written by an AI. It's an estimate: veggie sizes and brands make the numbers vary.
How much does it cost?
About $2.86 a serving, adding up the average prices of the ingredients you need to buy.
≈ $5.72for 2 people
≈ $2.86a serving
Pantry salt, oil and spices aren't counted. Your store and your brands will move the total, but the ballpark is right.
How long does it keep?
2 days in the fridge, in a closed container, once cooled within two hours. And it freezes really well.
2 daysin the fridge
Very wellin the freezer, thaw it in the fridge the day before