FrenchMedium · Hot
Golden Potato Gratin with Garlic and Thyme
A classic French bistro-style potato gratin with layers of thinly sliced potatoes bathed in a rich garlic and thyme cream, finished under the broiler until golden and bubbling.
Prep
20 min
Cook
1h 5m
Rest
5 min
Total
1h 30m
Method
Preparation
Make the Garlic Cream
2
3
Pour in the heavy cream and add the thyme sprigs. Season with salt and black pepper. Bring to a gentle simmer and cook for 5 minutes to infuse the flavors. Remove from heat and discard the thyme sprigs.
Assemble and Bake
4
5
6
Remove the foil, scatter the cheddar cheese over the top, and return to the oven for another 15-20 minutes until the cheese is melted, bubbly, and golden brown.
7
Allow the gratin to rest for 5 minutes before serving. The sauce will thicken slightly as it rests. Serve family-style directly from the dish.
B
Nutri-Score
Good balance
A–E · lower is better · score 2
Calories
598
per serving
High in saturated fat · 20gLow sugar · 5g
Protein
14g
Carbs
46g
Fat
41g
Sat. fat
20g
Fiber
6g
Sugar
5g
Sodium
627mg
Gluten FreeLactose ContainingHigh Saturated FatNot Heart HealthyNot Weight LossNot Low FatNot Low SodiumComfort FoodIndulgentRichSavory
Nutri-Score is a general nutritional-balance guide, not medical or dietary advice.
C
Environmental impact
Moderate impact
A–E · lower is better · includes estimates
kg CO2e
1.2
per serving
CCarbonAEU all-round· carbon sets the grade
Water
0.1m³
Land
30Pt
Runoff
0.08g P
Cheddar Cheese drives 51% of this recipe’s estimated footprint.
Carbon from Poore & Nemecek 2018; water, land & runoff from Agribalyse — modelled averages for comparing recipes, not a measurement of your groceries.
Flavor Profile
7
Umami
4
Sweet
6
Salty
1
Sour
1
Bitter
2
Spicy
Textures
CrispyCreamyTenderSilky
Aromas
HerbalButteryPungentCheesyEarthy
Kitchen Equipment
Primary Tool
SaucepanSaucepanConventional OvenMandolineChef'S KnifeCutting BoardWhiskCasserole DishMeasuring SpoonsAluminum Foil
Counter FootprintMedium
Safety & Storage
Cooking Temperature
Bake at 180C (350F) for 45 minutes until potatoes reach tender texture. Finish under broiler for 15-20 minutes until cheese is golden. Ensure cream sauce reaches simmer temperature during preparation to properly infuse flavors and eliminate potential surface bacteria.
The finished gratin must reach an internal temperature of at least 165F (74C) in the center before serving. Use a food thermometer to verify, particularly in the deepest part of the dish where potatoes are thickest. Cream-based dishes are high-risk for foodborne illness if not cooked to safe temperatures.
Cross Contamination
Use separate cutting boards and utensils for raw potatoes and prepared dairy ingredients. Sanitize surfaces after handling raw potatoes before placing cooked gratin. Do not use same tongs for raw and cooked elements during assembly.
Storage
Refrigerate within 2 hours of cooking. Store in airtight container for up to 3-4 days. Reheat to165F (74C) minimum before serving. Do not leave at room temperature for more than 2 hours total.
Shelf Life
Prepared gratin maintains quality for 3-4 days refrigerated. Cream-based dishes are high-risk for bacterial growth if improperly stored. Freeze for up to 1 month, though texture may degrade.
High Risk Population
This dish contains dairy (milk allergen). Persons with lactose intolerance, milk allergy, or compromised immune systems should ensure proper reheating to safe temperatures. Elderly, pregnant, and immunocompromised individuals are at elevated risk for dairy-related foodborne illness if stored improperly.
Handling
Use caution with mandoline slicer - keep fingers away from blade, use protective hand guard. Handle hot baking dish with dry oven mitts. Be aware of steam hazard when removing foil cover from dish. Hot cream sauce can cause severe burns.
Equipment Safety
Mandoline requires secure placement on flat surface during potato slicing. Ensure blade is properly attached and locked. Use food holder pusher to protect fingers. Clean blade carefully after use to prevent cuts.
Pro Tips
Technique
Slice your potatoes to 3-4mm — uniformity matters above all. I cannot stress this enough. Inconsistent slices mean some will be mushy while others remain raw. Use a mandoline if you have one; your gratin will reward you for the precision.
Equipment
I insist you make the garlic cream in a copper or stainless saucepan — never aluminum. The fond that develops as the garlic simmers in cream is the foundation of this dish, and aluminum disrupts both the flavor development and your ability to judge color.
Substitution
If you can find it, swap the cheddar for Gruyère or Comté. The nutty, earthy character of a good Swiss cheese is more authentically bistro, though I understand quality cheddar has its place.
Make Ahead
Assemble the gratin completely, cover, and refrigerate overnight. The next day, add 10-15 extra minutes to your covered baking time. The flavors deepen beautifully overnight, and this is a dish that forgives the busy host.
From the chef
This gratin, mes amis, is what I call honest cooking. No tricks, no shortcuts — just thinly sliced potatoes swimming in a garlicky cream, transformed in the oven into something golden and glorious. The key is patience: let the cream do its work, let the cheese bubble and brown until it reaches that perfect bronzed finish. When you pull it from the oven, that bubbling, crackling surface tells you everything — technique has triumphed once again.
TagsClassic FrenchBakedCheesyCreamyComfort FoodPotatoesGarlicThyme
AllergensMilk
Source: generated · June 10, 2026