Skip to main content
Main

Root Vegetable Gratin

A baked gratin of sliced root vegetables, onions, apples, and cheese in milk.

Jump to recipe ↓

Why it works: Parsnip and carrot match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 1,096 recipes mention both. Both carry 2-isobutyl-3-methoxypyrazine, which smells green bell pepper, earthy. The science ↓

The recipe

Oven400°F

Ingredients

Contains: milk, wheat, soy (auto-detected from the ingredients and method; we can miss things, so check labels)

Directions

Prepare

  1. Preheat oven to 400°F.

  2. Coat a 13- by 9- by 2-inch baking dish with vegetable oil spray.

Layer the vegetables

  1. Layer parsnips over the bottom of the dish, then sprinkle parsnips with salt, pepper, and 1 tablespoon flour.

  2. Layer carrots over the parsnips, then sprinkle carrots with salt, pepper, and the remaining tablespoon flour.

  3. Layer turnips over the carrots, then cover with apples and onion rings.

  4. Sprinkle the apples and onion rings with salt.

  5. Pour milk over the vegetables.

  6. Cover with aluminum foil, sealing the edges well.

Bake and serve

  1. Bake until the vegetables are tender and completely cooked, about 1 hour.

  2. Remove from the oven, uncover, and sprinkle with cheese.

  3. Return to the oven and bake until the top is browned, about 30 minutes.

  4. Let sit 5 to 10 minutes before serving.

Recipe from the Recipes Wiki (Fandom).

This recipe comes from the Recipes Wiki on Fandom and is licensed CC BY-SA 4.0. Our formatting and summaries are shared under the same licence.

Steps grouped into stages for easier reading; the method is the source's own.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.

  1. Parsnip + carrottop 1% of all pairs
    Aroma overlapstrong
    Mentioned together1,096 recipes

    Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).

  2. Pepper + carrottop 3% of all pairs
    Aroma overlapstrong
    Mentioned together14,555 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Onion + carrottop 4% of all pairs
    Aroma overlapstrong
    Mentioned together21,599 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  4. Cheddar cheese + appletop 4% of all pairs
    Aroma overlapstrong
    Mentioned together133 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  5. Milk + cheddar cheesetop 4% of all pairs
    Aroma overlapstrong
    Mentioned together1,963 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Parsnips
Provide starchy body and sweetness as they soften during the long, covered bake.
Flour
Thickens the milk into a creamy sauce that clings to the sliced vegetables.
Milk
Supplies the liquid that cooks the vegetables and forms the creamy base.
Cheddar cheese
Melts and browns on top, adding richness and a golden crust.
Turnips
Add a mild, slightly peppery body that holds its shape through baking.

The step that matters

Cover and bake until fully tender before adding cheese. Sliced root vegetables need long, covered heat to soften through; the foil traps steam so they cook evenly. Adding cheese too early would burn it before the vegetables are done.

Flavor stand-ins for the onion

How well each one fits the dish's main ingredients (milk, cheddar cheese, apple, parsnip, pepper, flour, carrot):

  1. Capsicumbetter flavor fit
  2. Potatobetter flavor fit
  3. Tomatobetter flavor fit
  4. Onionthe original

Fit is the average pairing score against milk, cheddar cheese, apple, parsnip, pepper, flour, carrot. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

You might also like