Butternut Squash Casserole

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There’s something undeniably cozy about a bubbling, golden-topped casserole fresh out of the oven. Butternut Squash Casserole is one of those soul-warming dishes that captures fall in every bite. With sweet roasted squash, savory sausage, and a hint of sage, it’s a comfort food classic that makes the perfect side dish for holidays or a main dish for chilly weeknights.

What makes this casserole stand out is its beautiful harmony of flavors and textures. The creamy, slightly sweet butternut squash balances the saltiness of the sausage and the richness of the cheese, while fresh herbs add aromatic depth. Every spoonful is hearty and satisfying, yet it doesn’t feel overly heavy. Whether you’re feeding a family or meal-prepping for the week, this dish is a true crowd-pleaser.

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Preparation Phase & Tools to Use

To get started with Butternut Squash Casserole, you’ll want to be organized and have the right tools on hand. This not only makes the process smoother but also ensures that every step turns out just right.

1. Large Sharp Knife – Butternut squash has a thick skin and dense flesh. A sturdy, sharp knife is essential for safe, clean cutting.

2. Vegetable Peeler – A Y-peeler makes removing the squash’s tough outer layer easy and efficient.

3. Baking Sheet – Roasting the squash before adding it to the casserole concentrates its flavor and gives it a lovely caramelized texture.

4. Large Skillet – Needed for browning the sausage and sautéing aromatics like onion, garlic, and herbs.

5. Casserole Dish (9×13) – This is your final baking vessel, where all the magic happens. Choose ceramic or glass for even heat distribution.

6. Mixing Bowls & Silicone Spatula – For combining ingredients easily without making a mess. The spatula helps get every bit out of your bowls.

With these tools ready, you’re set up for a smoother cooking experience and a perfectly baked Butternut Squash Casserole.

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Ingredients for the Butternut Squash Casserole

Each ingredient in this dish plays a thoughtful role in building rich flavor and texture:

• Butternut Squash – The star of the show! Its natural sweetness and creamy texture provide a smooth contrast to the savory elements.
• Ground Sausage – Adds savory depth and a bit of spice depending on the variety you choose. It complements the sweetness of the squash beautifully.
• Onion – Brings mild sharpness and aroma, forming a flavorful base.
• Garlic – Enhances everything with its rich, pungent notes.
• Fresh Sage – Earthy and fragrant, this herb gives the casserole a warm, autumnal touch.
• Thyme – Subtle yet aromatic, thyme supports the sage and rounds out the herb profile.
• Cheddar Cheese – Melty and rich, cheddar brings that gooey, comforting texture we love in casseroles.
• Breadcrumbs or Cornbread Crumbs – Add a bit of crunch on top and help bind everything together.
• Olive Oil or Butter – Used for roasting and sautéing, enhancing flavor and texture.
• Salt & Pepper – Seasoning essentials that tie all components together.

How To Make the Butternut Squash Casserole

Step 1: Prep and Roast the Squash

Preheat your oven to 400°F. Peel, seed, and dice the butternut squash into small cubes. Toss them with olive oil, salt, pepper, and a pinch of thyme. Spread them on a baking sheet and roast for 25-30 minutes until tender and slightly caramelized.

Step 2: Brown the Sausage and Aromatics

While the squash is roasting, heat a skillet over medium heat. Add sausage and cook until browned, breaking it up as it cooks. Drain excess fat if needed. Add chopped onion, garlic, sage, and thyme to the skillet. Sauté until fragrant and the onion is translucent.

Step 3: Combine and Layer

In a large mixing bowl, gently combine the roasted squash and sausage mixture. Add half of the shredded cheddar cheese and stir to mix.

Step 4: Assemble in Casserole Dish

Lightly grease a 9×13 baking dish. Pour in the mixture and spread evenly. Top with remaining cheese and breadcrumbs (or crumbled cornbread) for a crunchy topping.

Step 5: Bake to Perfection

Bake at 375°F for about 20-25 minutes, or until the top is golden and bubbly. Garnish with fresh sage leaves before serving if you’d like an extra pop of color.

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Best Ways to Serve and Store Butternut Squash Casserole

This casserole shines as both a holiday side and a cozy main dish. Serve it warm alongside roasted turkey, glazed ham, or a crisp green salad. It also pairs beautifully with crusty bread or soft dinner rolls to soak up every last bit of flavor.

If you’re making it ahead or storing leftovers, let the casserole cool completely before covering tightly with foil or placing in an airtight container. It keeps well in the refrigerator for up to 4 days. To reheat, bake at 350°F until warmed through or microwave individual portions for a quick lunch.

For longer storage, freeze the baked casserole in a freezer-safe dish. Thaw overnight in the fridge before reheating.

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Frequently Asked Questions

How do I peel a butternut squash easily?

Use a sturdy vegetable peeler or microwave the whole squash for 1-2 minutes to soften the skin slightly before peeling.

Can I make this casserole vegetarian?

Absolutely! Swap the sausage for sautéed mushrooms or a plant-based sausage alternative for a meatless version.

What type of sausage works best?

Mild Italian sausage is a great starting point, but spicy or sage sausage adds extra flavor depending on your taste preference.

Can I prep this casserole ahead of time?

Yes! Assemble everything (except the topping) a day in advance and refrigerate. Add the cheese and breadcrumbs just before baking.

Is there a substitute for cheddar cheese?

You can try mozzarella for a milder melt or gruyère for a nutty richness. Mix and match based on what you love!

How can I make this gluten-free?

Use gluten-free breadcrumbs or cornbread, and ensure your sausage is certified gluten-free.

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Want More Casserole Ideas?

If you’re loving this Butternut Squash Casserole, here are a few more comforting and delicious bakes from Life With Olivia that you should definitely try next:

• Chicken Cordon Bleu Casserole for a creamy, cheesy twist on a classic.
• Mexican Cornbread Casserole if you’re in the mood for bold, spicy flavors.
• Million Dollar Ravioli Casserole for a pasta-packed family favorite.
• Cheesy Pizza Tater Tot Casserole when you want something kid-friendly and fun.
• Chicken and Stuffing Casserole for that classic Thanksgiving comfort, any time of year.

And if you’re hungry for more daily inspiration, follow my recipe boards on Pinterest @scherer29. I share all my favorite cozy meals and seasonal must-tries there!

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Save This Recipe for Later

📌 Save this recipe to your Pinterest comfort food board so it’s ready when the craving strikes.

Have you tried this casserole already? I’d love to hear what you thought! Did you go spicy with your sausage? Mix in a different cheese? Drop a comment below and share your twist!

And as always, if you have questions about the recipe or substitutions, I’m here to help.

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