Julia Child’s Zucchini Gratin Recipe
Introduction
Julia Child’s Zucchini Gratin is a simple yet elegant side dish that highlights the delicate flavors of zucchini with a buttery, cheesy crust. Perfect for summer dinners or a comforting addition to any meal, this gratin is easy to prepare and sure to impress.

Ingredients
- 4 medium zucchinis, sliced thin
- 1 medium onion, finely chopped
- 2 tablespoons butter
- 1 cup grated cheese (Gruyère or Parmesan works well)
- 1/2 cup breadcrumbs
Instructions
- Step 1: Preheat your oven to 375°F (190°C). In a large skillet, melt the butter over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes.
- Step 2: Add the sliced zucchini to the skillet and cook until just tender, about 5-7 minutes. Remove from heat.
- Step 3: Transfer the zucchini and onion mixture to a baking dish. Sprinkle the grated cheese evenly over the top, then cover with breadcrumbs to create a crunchy crust.
- Step 4: Bake in the preheated oven for 20-25 minutes, or until the top is golden brown and bubbling.
- Step 5: Remove from the oven and let it rest for a few minutes before serving. This allows the gratin to set slightly for easier serving.
Tips & Variations
- For extra flavor, try adding a teaspoon of fresh thyme or rosemary to the zucchini while sautéing.
- Substitute breadcrumbs with crushed pita chips or crushed nuts for a different texture.
- If you prefer a lighter version, use part-skim cheese or reduce the amount of butter used.
Storage
Store leftover gratin covered in the refrigerator for up to 2 days. To reheat, warm in the oven at 350°F (175°C) until heated through and the crust is crispy again, about 10-15 minutes.
How to Serve
Serve this delicious recipe with your favorite sides.
FAQs
Can I prepare this gratin ahead of time?
Yes, you can assemble the gratin a few hours before baking. Keep it covered in the refrigerator and bake just before serving for best results.
What type of cheese works best?
Gruyère or Parmesan are classic choices because they melt well and add a rich, nutty flavor. You can also use cheddar or mozzarella for a different taste and texture.
PrintJulia Child’s Zucchini Gratin Recipe
Julia Child’s Zucchini Gratin is a classic French-inspired side dish featuring tender sautéed zucchini layered with sweet onions, rich butter, creamy cheese, and topped with crispy golden breadcrumbs. This comforting gratin combines simple ingredients with expert technique to create a flavorful, creamy, and crunchy casserole perfect for any meal.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 4 servings 1x
- Category: Side Dish
- Method: Baking
- Cuisine: French
- Diet: Vegetarian
Ingredients
Vegetables
- 3 medium zucchinis, sliced into 1/4 inch thick rounds
- 1 medium onion, thinly sliced
Dairy & Fats
- 2 tablespoons unsalted butter
- 1 cup grated Gruyère cheese or Swiss cheese
Others
- 1/2 cup fresh breadcrumbs
- Salt, to taste
- Freshly ground black pepper, to taste
Instructions
- Prep the Vegetables: Wash and slice the zucchinis into 1/4 inch thick rounds. Peel and thinly slice the onion so it will cook evenly with the zucchini.
- Sauté Zucchini and Onions: In a large skillet, melt the butter over medium heat. Add the sliced onions and cook until they turn translucent and slightly caramelized, about 5-7 minutes. Add the sliced zucchini and sauté until just tender, about 5 more minutes, seasoning with salt and pepper. Remove from heat.
- Assemble the Gratin: Preheat your oven to 375°F (190°C). Spread half of the sautéed zucchini and onions evenly in a buttered baking dish. Sprinkle half of the grated cheese over the first layer. Add the remaining zucchini and onions and top with the remaining cheese.
- Add Breadcrumb Topping: Evenly sprinkle fresh breadcrumbs over the top layer of cheese to create a crunchy golden crust.
- Bake Until Golden and Bubbling: Place the gratin in the preheated oven and bake for 20-25 minutes or until the top is golden brown and bubbly. Let it rest a few minutes before serving to set.
Notes
- Use freshly grated cheese for best melting and flavor.
- Gruyère is traditional, but Swiss or mild cheddar can be substituted.
- For extra richness, a splash of cream can be added to the zucchini mixture before assembling.
- Serve as a side dish with roasted meats or as a vegetarian main with a salad.
- Breadcrumbs can be toasted beforehand for a crunchier topping.
Keywords: Zucchini Gratin, Julia Child, French side dish, baked vegetable casserole, Gruyère cheese gratin, vegetable bake

