Zucchini Gratin with Yellow Squash – Creamy, Cheesy & Irresistible

Zucchini Gratin with Yellow Squash – A Rich, Cheesy Crowd-Pleaser

When you’re craving something rich and comforting that still highlights seasonal veggies, this Zucchini Gratin with Yellow Squash delivers the best of both worlds. Picture layers of tender squash nestled in creamy, garlicky sauce, topped with smoky melted Gouda—it’s the kind of dish that makes any dinner feel extra special.

Whether you’re serving grilled meats, holiday roasts, or a laid-back weeknight meal, this golden gratin is sure to be the star of the table.

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❤️ Why I Love This Recipe

This dish is a go-to because it’s equal parts indulgent and fresh. The zucchini and yellow squash hold their texture beautifully, even under layers of cream and cheese. Plus, smoked Gouda brings a hint of elegance and flavor depth that turns this from a simple veggie bake into something unforgettable.

It’s also a one-pan wonder when made in a skillet—less cleanup, more flavor.

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🛒 Ingredients

• 2 tbsp butter
• 1/2 onion, thinly sliced
• 1 small zucchini, sliced into rounds (1/8 to 1/4 inch thick)
• 1 small yellow squash, sliced the same way
• 2 garlic cloves, minced
• 1/2 cup heavy cream
• 1/4 cup grated Parmesan cheese
• 1 cup shredded smoked Gouda

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🔁 Ingredient Notes & Swaps

• Smoked Gouda: Its creamy texture and smoky flavor make this dish shine. Sub with Gruyère, Fontina, or even cheddar in a pinch.
• Parmesan: Adds salty umami to balance the cream.
• Heavy Cream: You can use half-and-half for a lighter version.
• Zucchini + Yellow Squash: Use all zucchini or all yellow squash if that’s what you have.

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👨‍🍳 Step-by-Step Instructions

Step 1: Preheat the Oven

• Set your oven to 450°F (232°C) and make sure your skillet is oven-safe.

Step 2: Sauté the Aromatics

• In the skillet, melt the butter over medium heat.
• Add sliced onions and sauté for about 5 minutes, until golden at the edges.
• Add garlic and cook another minute, stirring often.

Step 3: Build the Cream Sauce

• Pour in the heavy cream and simmer until it starts to bubble and slightly thicken.
• Stir in the Parmesan until smooth and melted.

Step 4: Add the Squash

• Mix in zucchini and yellow squash slices.
• Cook for 4–5 minutes, just until slightly tender.

Step 5: Top with Cheese & Bake

• Sprinkle smoked Gouda over the skillet contents.
• Transfer to oven and bake for 15–20 minutes, until bubbly and golden on top.

Step 6: Rest and Serve

• Let it sit for a few minutes before serving so the cheese settles.
• Garnish with fresh herbs if desired (chives or parsley work beautifully).

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💡 Tips for Success

• Uniform slices help the squash cook evenly. A mandoline works wonders here.
• Don’t overcook on the stove—they’ll finish in the oven.
• Let it cool a bit before digging in—this helps the cream set and enhances flavor.

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🍽️ Serving & Pairing Ideas

This gratin pairs perfectly with:

• Roasted chicken or turkey
• Grilled steak or sausage
• A cozy Southern main like Cajun Chicken Sausage Gumbo
• Try it next to a skillet dinner like Tomato Skillet with Okra and Sausage
• Or serve it with fun comfort bites like Totchos or Dorito Casserole

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🧊 Storage & Leftovers

• Refrigerate leftovers in an airtight container for up to 3 days.
• Reheat gently in the oven or microwave until warmed through.
• Freezing not recommended—the cream may separate when thawed.

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🥄 Final Thoughts

This Zucchini Gratin with Yellow Squash is more than just a side—it’s comfort food with a garden-fresh heart. Whether you’re using up summer squash or craving something creamy and cozy, this dish will have everyone coming back for seconds.

Tried it? Tag @ChefManiac in your kitchen creations! And if you’re craving more cheesy, cozy favorites, don’t miss out on our full comfort food archive.