Name: Ina Garten Butternut Squash Gratin
Prep time: 20 min
Cook time: 1 h
Total time: 1 h 20 min
Yield: 4
Cuisine: French
Ingredients: 2 pounds butternut squash, peeled, seeded, and sliced 1/4-inch thick; 2 tablespoons unsalted butter; 1 tablespoon olive oil; 1 medium onion, thinly sliced; 2 cloves garlic, minced; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 1/4 teaspoon ground nutmeg; 1 cup heavy cream; 1/2 cup whole milk; 1 cup grated Gruyère cheese (about 4 ounces); 1/2 cup panko breadcrumbs; 1/4 cup grated Parmesan cheese; 2 tablespoons chopped fresh parsley

Layered squash, a garlicky cream sauce, and a cheesy breadcrumb crust — this Ina Garten Butternut Squash Gratin gets the balance right. The edges caramelize against the pan while the center stays soft and custardy, and the Gruyère melts into the cream instead of sitting on top of it. This version is inspired by her classic French-style gratin, written out with exact times and temperatures so it works the first time.

Total time runs 80 minutes, with 20 minutes of prep and 60 minutes in the oven. Difficulty sits at beginner to intermediate — most of the work is slicing squash evenly and waiting for the cream to warm without boiling. It belongs on a holiday table next to roast chicken or turkey, and it holds up as a weeknight side when you want something richer than plain roasted squash.

What Is Ina Garten Butternut Squash Gratin?

It is a baked side dish of thin butternut squash slices layered with softened onions and a light nutmeg-scented cream, then topped with Gruyère, panko, and Parmesan. The squash turns tender enough to cut with a spoon, and the topping crisps into a golden crust during the uncovered half of the bake. The flavor is savory and faintly sweet, with the nutmeg and black pepper keeping the cream from tasting flat. Serve it any time squash is in season, from October through February.

Reasons to Try Ina Garten Butternut Squash Gratin

A few things make this worth the oven time over a plain tray of roasted squash cubes.

Simple ingredient list — Fourteen everyday items, and the most unusual one is Gruyère, which most larger grocery stores stock near the specialty cheese counter.
Creamy, not soupy — The squash releases liquid as it bakes, but the foil-covered first bake and the resting time at the end keep the sauce thick rather than watery.
Make-ahead friendly — You can assemble the layers, pour on the cream, and refrigerate up to a day before the bake.
Feeds a crowd as a side — Four generous servings, or six smaller ones alongside a big holiday spread.
Impressive without fuss — The caramelized edges and browned crumb look deliberate, but the method is just layering and pouring.
Balanced richness — Nutmeg and black pepper cut through heavy cream and cheese, so it tastes savory rather than heavy.

Ingredients Needed to Make Ina Garten Butternut Squash Gratin

Most of these are pantry items, plus one trip to the cheese counter. Here is the full list, grouped so nothing gets missed.

The Squash and Aromatics

2 pounds butternut squash — Peeled, seeded, and sliced 1/4-inch thick. A sharp knife and a steady hand matter more than a mandoline here.
1 medium onion — Thinly sliced and cooked until lightly golden, which builds the savory base.
2 cloves garlic — Minced; add it last so it turns fragrant without browning.
2 tablespoons unsalted butter — One tablespoon butters the dish, the other melts into the breadcrumb topping.
1 tablespoon olive oil — For sweating the onion over medium heat.

The Cream Sauce and Seasoning

1 cup heavy cream — The richness of the gratin depends on it, so avoid swapping in half-and-half.
1/2 cup whole milk — Thins the cream just enough to pour evenly between the squash layers.
1 teaspoon kosher salt — Kosher rather than table salt, so the seasoning stays consistent.
1/2 teaspoon freshly ground black pepper — Fresh grinding gives more bite than pre-ground.
1/4 teaspoon ground nutmeg — A small amount goes a long way with winter squash.

The Cheese and Crumb Topping

1 cup grated Gruyère cheese (about 4 ounces) — Nutty and melty; Comté or Swiss work as stand-ins.
1/2 cup panko breadcrumbs — Panko stays crisp longer than regular crumbs.
1/4 cup grated Parmesan cheese — Adds a salty edge to the crust.
2 tablespoons chopped fresh parsley — Scattered at the end for color and a fresh note.

Instructions to Prepare Ina Garten Butternut Squash Gratin

The method runs in three phases: soften the onions, build and bake the layers under foil, then finish with the crumb topping. Watch the cream closely in step four — it should steam, not bubble.

Prep the oven and dish — Preheat to 375°F (190°C) and butter a 2-quart baking dish with 1 tablespoon of the butter.
Soften the onion — Heat the olive oil in a large skillet over medium heat until it shimmers, then cook the sliced onion, stirring occasionally, until softened and lightly golden, about 8 minutes.
Bloom the garlic and seasoning — Add the garlic and cook until fragrant, about 30 seconds, then stir in the salt, pepper, and nutmeg and pull the pan off the heat.
Warm the cream — Combine the cream and milk in a small saucepan and warm over low heat until steaming but not boiling. Boiling risks scorching the dairy and breaking the sauce.
Build the layers — Spread half the squash in the dish, top with the onion mixture, then layer the remaining squash on top.
Add the cream and cheese — Pour the warm cream evenly over the squash and sprinkle the Gruyère across the top.
Bake covered — Cover tightly with aluminum foil and bake for 30 minutes, until the squash is just tender when pierced with a knife.
Mix the topping — Melt the remaining 1 tablespoon butter, then toss it with the panko and Parmesan in a small bowl.
Bake uncovered — Remove the foil, scatter the crumb mixture over the top, and bake another 20 to 25 minutes, until golden brown and completely tender.
Rest before serving — Let it sit 5 to 10 minutes so the cream sets, then sprinkle with parsley.

What Goes Well With Ina Garten Butternut Squash Gratin

Because the dish is rich, pair it with something bright or simply roasted to keep the plate balanced.

Roast chicken — A whole bird or bone-in thighs carve nicely and soak up the cream from the gratin.
Green salad — Arugula tossed with lemon and olive oil cuts through the cheese and butter.
Roast turkey — Classic holiday pairing, especially with cranberry sauce on the side.
Crusty bread — Use it to mop up the garlicky cream left in the dish.
Sparkling cider — Chilled and poured into glasses, it cleans the palate between bites.
Herb-roasted green beans — A simple vegetable side that keeps the meal from feeling too heavy.

Key Tips for Making Ina Garten Butternut Squash Gratin

A handful of details separate a creamy gratin from a watery one — here is what to watch.

Slice evenly — Aim for a consistent 1/4-inch thickness so every piece cooks at the same rate; thick slices stay firm while thin ones turn to mush.
Keep the cream below a boil — Warm it only until steaming, since boiling can split the sauce before it ever reaches the oven.
Press the layers gently — A light press helps the squash settle so the cream distributes evenly instead of pooling at the edges.
Use a 2-quart dish — Too large and the layers spread thin and dry out; too small and the cream overflows.
Watch the topping during the uncovered bake — Panko browns fast in the last five minutes; if the top darkens too quickly, tent it loosely with foil.
Rest before serving — That 5 to 10 minute rest lets the cream thicken, so portions hold together on the plate.
Season the squash, not just the cream — A light pinch of salt across each squash layer seasons the vegetable from the inside out.

Creative Variations of Ina Garten Butternut Squash Gratin

The base method holds up well to swaps. Try one of these if you want a different flavor profile.

Swap the cheese — Comté, fontina, or a sharp white cheddar all melt well and bring their own character to the crust.
Add fresh herbs — Thyme or sage stirred into the onion mixture deepens the savory flavor; use about a teaspoon of chopped leaves.
Try a spicier take — A pinch of cayenne or a few red pepper flakes in the cream offsets the sweetness of the squash.
Layer in potatoes — Thinly sliced Yukon Gold potatoes mixed with the squash turn it into a heartier root-vegetable bake.
Make it individual — Divide the layers among small gratin dishes and shorten the bake, checking for tenderness around 25 minutes.
Go extra crispy — Double the panko and Parmesan topping for a thicker crust if crunch is what you are after.

Storage Guidelines for Ina Garten Butternut Squash Gratin

Leftovers keep well, though the topping softens once chilled.

Refrigerating — Cover the dish or transfer to an airtight container and store up to 3 days.
Freezing — Not recommended, since the cream sauce may separate on thawing and turn grainy.
Cooling first — Let leftovers cool to room temperature before covering, so condensation does not water down the top.
Separating portions — Store individual servings in smaller containers so you only reheat what you need.

Reheating Tips for Ina Garten Butternut Squash Gratin

Reheat gently — high heat tightens the cream and dries out the crumb.

Oven — Reheat at 350°F (175°C) for 15 to 20 minutes, or until heated through; cover loosely with foil if the top is already brown.
Microwave — Single portions take about 2 minutes on medium power; the topping will soften, which is the trade-off for speed.
Air fryer — Around 320°F (160°C) for 6 to 8 minutes re-crisps the panko nicely for single servings.
Skillet — A covered nonstick pan over low heat warms portions evenly and keeps the bottom from scorching.

Nutrition Value (Per Serving)

Based on 4 servings per recipe.

Calories — 465
Protein — 12g
Fat — 30g
Saturated Fat — about 17g
Carbohydrates — 48g
Fiber — 6g
Sugar — 8g
Sodium — around 500mg
Cholesterol — roughly 85mg

FAQs

Can I make Ina Garten Butternut Squash Gratin ahead of time?

Yes. Assemble the layers, pour on the warm cream, and refrigerate covered for up to 24 hours. Add the breadcrumb topping just before baking so it stays crisp.

How do I know when the squash is fully cooked?

A knife should slide through the thickest slice with no resistance. If it meets any pushback after the uncovered bake, give it another 5 minutes and check again.

Can I freeze Ina Garten Butternut Squash Gratin?

It is not recommended. The cream sauce tends to separate during freezing and thawing, leaving a grainy texture. Refrigerating leftovers for up to 3 days works far better.

Why did my gratin turn out watery?

Usually it is underbaking or skipping the rest. The squash needs the full uncovered bake to drive off moisture, and the 5 to 10 minute rest lets the cream thicken before serving.

What can I use instead of Gruyère?

Comté and Swiss are the closest matches for that nutty melt. Fontina or a sharp white cheddar also work if you want a slightly different flavor.

Can I use frozen butternut squash?

Fresh is best here because frozen cubes release too much water and turn soft before the center sets. If you only have frozen, thaw and pat it very dry, then expect a looser sauce.