French

Medium · Hot

Potato, Carrot and Thyme Gratin

Thin-sliced potato and carrot are layered into the dish with thyme tucked between and garlic run through the cream that is poured over the top and settles into every gap. The oven does the long, slow work — the cream thickens, the edges crisp, and the kitchen fills with something that smells unmistakably of Sunday. Cut it in generous squares and let it sit for a few minutes before serving.

Recipe by

Esther Vogel

The Ladle Keeper

Prep

20 min

Cook

Rest

5 min

Total

1h 25m

Method

Prep

Preheat oven to 375°F (190°C). Thinly slice potatoes and carrots into 1/8-inch rounds. Mince the garlic and finely dice the yellow-onion.

Cream Base

Melt butter in a saucepan over medium heat. Add the diced onion and cook until softened and translucent, about 5 minutes. Add the minced garlic and cook until fragrant, about 1 minute more.

Pour in the heavy cream and whole-milk. Season with salt, black-pepper, and nutmeg. Strip in most of the fresh thyme leaves, reserving a pinch for the top. Bring to a gentle simmer and cook for 3 minutes, stirring occasionally.

Assemble

Butter a 9x13 baking dish. Arrange a layer of overlapping potato slices on the bottom, followed by a layer of carrot rounds. Repeat until all vegetables are used, staggering the slices like roof tiles.

Pour the warm cream mixture evenly over the layered vegetables, making sure it seeps down the sides. Scatter the remaining thyme leaves over the top.

Bake

Cover tightly with foil and slide into the oven. Bake for 40 minutes, until the vegetables are nearly tender and the sauce is bubbling at the edges.

Remove the foil and increase oven temperature to 400°F (200°C). Return uncovered and bake another 15-20 minutes until the top is golden brown and bubbling. Let rest 5 minutes before spooning into warm bowls.

Nutri-Score

Fair balance

A–E · lower is better · score 5

Calories

354

per serving

High in saturated fat · 13gLow sugar · 7g

Protein

Carbs

22g

Fat

29g

Sat. fat

13g

Fiber

Sugar

Sodium

670mg

Gluten FreeHeart Health ConcernBlood Pressure ModerationVegetable ForwardComfort Food Occasion

Nutri-Score is a general nutritional-balance guide, not medical or dietary advice.

Environmental impact

Low impact

A–E · lower is better · includes estimates

kg CO₂e

0.6

per serving

BCarbonAEU all-round· carbon sets the grade

Water

0.1m³

Land

19Pt

Runoff

0.05g P

heavy-cream drives 60% 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

Umami

Sweet

Salty

Sour

Bitter

Spicy

Textures

CrispyTenderCreamySilky

Aromas

HerbalCreamyNuttySavory

Kitchen Equipment

Primary Tool

Baking Dish

Saucepan Baking Dish Chef Knife Cutting Board Mandoline Wooden Spoon Ladle Aluminum FoilButter For Greasing

Counter FootprintMedium

Techniques

SautéIngSimmeringLayeringBaking Basting

Safety & Storage

Cooking Temperature

Bake covered at 375°F for 40 minutes to ensure vegetables tenderize and sauce bubbles. Uncover and increase to 400°F for 15-20 minutes to achieve golden-brown top without burning.

Storage

Refrigerate any leftover gratin within 2 hours in an airtight container. Consume within 3-4 days. Dairy-based dishes are perishable and support bacterial growth at room temperature.

Cross Contamination

Use separate cutting boards for vegetables. If also handling allergen-containing ingredients like cheese or milk products, sanitize surfaces between uses to prevent allergen transfer.

High Risk Population

This dish contains dairy. Individuals with milk allergy or lactose intolerance should avoid or seek alternatives. Reheating must reach 165°F to ensure food safety for vulnerable populations.

Allergen Warning

Butter and cream are derived from cow's milk. Verify no hidden dairy in pre-made ingredients. Check for shared equipment if using store-bought thyme or other pre-prepared components.

Handling

Use oven mitts when handling the baking dish at high temperatures. Allow gratin to cool slightly before serving to prevent burns from bubbling cream when spooning.

Pro Tips

Technique

Slice your potatoes and carrots as thin as you dare — about 1/8 inch. Thinner slices mean more layers, more cream clinging to every surface, and a gratin that cooks faster without drying out. A mandoline makes this almost meditative.

Reheating

Cover the dish loosely with foil when reheating leftovers in a 350°F oven for about 20 minutes. This keeps the top from drying before the center warms through.

From the chef

Thin-sliced potato and carrot layered into a buttered dish with thyme tucked between every tier and garlicky cream poured over until it finds every gap — this gratin does most of its work without you. Cover it and let the oven coax those layers soft for forty minutes, then uncover and let the top go properly golden. The cream thickens as it bakes, the thyme perfumes every bite, and the carrots bring a gentle sweetness against the starchy potato. Cut it in generous squares and let it rest a few minutes before you serve it.

Esther VogelThe Ladle Keeper

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TagsVegetarianComfort FoodBakedCreamyPotatoesCarrotsHerbs

AllergensMilk

Source: generated · May 30, 2026