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Sage Butternut Squash Gratin: 1 Divine Dish

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lilyaBlog

October 12, 2025

Sage Butternut Squash Gratin - Featured

Oh, when it comes to those cozy, hug-in-a-dish kind of meals, nothing beats a really good gratin. And let me tell you, this Sage Butternut Squash Gratin? It’s pure magic. It’s got this incredible balance of creamy, sweet squash with the earthy, savory kick of fresh sage. I remember the first time I made this; it was for a Thanksgiving potluck, and people were *raving* about it. It’s fancy enough for holidays, but honestly, it’s so easy you could totally whip it up on a Tuesday to spice up your weeknight dinner. It just feels so special, and the smell when it’s baking? Divine!

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Why You’ll Love This Sage Butternut Squash Gratin

Seriously, there are so many reasons why this gratin is a total winner in my kitchen. My family devours it every single time, and I bet yours will too!

  • Incredible Flavor Combo: It’s this perfect marriage of sweet, tender butternut squash and aromatic fresh sage, all enveloped in a luscious creamy sauce. So comforting!
  • Dreamy Texture: You get that melt-in-your-mouth softness from the squash with a lovely, slightly bubbly, golden-brown cheesy topping. Yum!
  • Super Easy to Make: Honestly, just a little slicing and mixing! It looks and tastes super fancy, but it’s really straightforward.
  • Utterly Versatile: It’s the perfect side dish for roasted meats, pot roast, or even just a simple baked chicken. Makes any meal feel special.

Ingredients for Sage Butternut Squash Gratin

Okay, so grabbing the right stuff is key to making this gratin sing! It really doesn’t take much, and using fresh ingredients makes all the difference. Trust me on this – fresh sage is a game-changer compared to dried!

Here’s what you’ll need:

  • 1 medium butternut squash, peeled, seeded, and thinly sliced (aim for about 3 cups of slices). Using a mandoline is great for this, but a sharp knife and a steady hand work too!
  • 1 tablespoon good quality olive oil.
  • 1 cup heavy cream – this is what makes it so rich and decadent!
  • 1/2 cup whole milk. We’re not skimping on creaminess here.
  • 2 cloves garlic, minced. Fresh garlic is a must; it adds that perfect savory depth.
  • 1 tablespoon fresh sage, finely chopped. See? Fresh makes it pop!
  • 1/4 teaspoon salt, plus a little extra for seasoning the squash.
  • 1/8 teaspoon black pepper, freshly ground if you have it!
  • 1/2 cup grated Parmesan cheese. Get the good stuff, it melts so much better!

Using fresh, vibrant ingredients truly is the secret sauce to a dish that tastes as good as it looks. Don’t be afraid to really hone in on those fresh herbs and good quality cheese; they’re the unsung heroes here!

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Essential Equipment for Making Sage Butternut Squash Gratin

To get this delicious Sage Butternut Squash Gratin perfect every time, you’ll want a few trusty tools on hand. It’s not complicated, but having the right things just makes the process so much smoother. You’ll need a good baking dish – a 9×13 inch baking dish is usually just right for this amount. Grab a sharp knife and a trusty cutting board for prepping that squash, and of course, your essential measuring cups and spoons to get those creamy liquids and spices spot on. And don’t forget a couple of good-sized mixing bowls for tossing everything together!

Step-by-Step Guide to Your Sage Butternut Squash Gratin

Alright, let’s get this yummy Sage Butternut Squash Gratin into the oven! I promise, it’s easier than it sounds. You just follow these steps, and you’ll have a dish that’ll make everyone ask for your secrets. Think of it like building a cozy little squash blanket!

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Preparing the Butternut Squash for the Gratin

First things first, preheat your oven to 375°F (190°C). You want it nice and toasty when the gratin is ready. Now, grab that prepped butternut squash. Take your seasoned slices and toss them around in a bowl with that tablespoon of olive oil, plus a little pinch of salt and pepper. You want them coated just right so they don’t stick and have a nice base flavor. Consistency in your slicing is super important here – try to get them all about the same thickness, maybe 1/8 to 1/4 inch thick. This helps them cook up evenly, so you don’t have some mushy bits and some hard ones. It’s those little details that make a big difference, just like in my roasted veggie mixes!

Creating the Creamy Sage Sauce

While your squash is chilling (metaphorically speaking!), let’s whip up that gorgeous, creamy sauce. In a separate bowl, pour in your heavy cream and milk. Then, add in that minced garlic and the finely chopped fresh sage. Give it all a really good whisk! You want this mixture to be nice and smooth, no garlic lumps floating around. This sauce is what’s going to make the squash so tender and flavorful. It’s like magic in a bowl, and it’s the perfect base, kind of like how I build flavor in my roasted cabbage steaks.

Assembling and Baking Your Sage Butternut Squash Gratin

Now for the assembly! Grab your baking dish. Arrange the oiled and seasoned squash slices in a single layer. Don’t worry if they overlap a bit; that’s totally fine. Once your squash is neatly arranged, pour that beautiful creamy sage mixture all over the top. Make sure to get it into all the little nooks and crannies. And the grand finale for the top? Sprinkle that grated Parmesan cheese evenly all over everything. It’s going to get all golden and bubbly. Pop that dish into your preheated oven and bake it for about 40 to 50 minutes. You’re looking for the squash to be fork-tender and that cheesy topping to be a lovely golden brown. Keep an eye on it towards the end; ovens can be a little wild sometimes!

Resting and Serving the Gratin

Once it’s out of the oven and looking glorious, do yourself a favor and let it rest for about 5 minutes before digging in. Trust me on this! It helps everything settle, making it easier to serve and the flavors meld together even more. Then, scoop it up and enjoy!

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Tips for the Best Sage Butternut Squash Gratin

Alright, so you want your Sage Butternut Squash Gratin to be absolutely perfect, right? I totally get it! There are a few little tricks I’ve picked up along the way that really make a difference. First off, the squash slicing – try to get them as uniform as possible, about 1/8 to 1/4 inch thick. This little bit of extra effort ensures everything cooks through evenly, no mushy bits or stubborn hard pieces! It’s similar to how I like my veggies in my honey curry roasted cauliflower, nice and consistent.

Another thing? Fresh sage is your best friend here. Dried sage just doesn’t have that bright, distinctive flavor that fresh leaves bring. And don’t be shy with that Parmesan cheese on top! A good quality parmesan will give you that lovely golden crust. If you really want to jazz it up, a sprinkle of panko breadcrumbs mixed with the cheese is *chef’s kiss*! It gives it an extra delightful crunch that’s just divine with the creamy squash. If you find your gratin is cooking a bit too fast on top before the squash is tender, you can always loosely tent it with foil. It’s all about balance, like in my garlic parmesan chicken pasta, where you want everything cooked just right!

Ingredient Notes and Substitutions for Sage Butternut Squash Gratin

Let’s talk about these ingredients for our Sage Butternut Squash Gratin for a sec. Sometimes you might be missing something, or just want to tweak it a bit, and that’s totally fine! Fresh sage is really the star here; it’s got this amazing, earthy flavor that’s just *perfect* with butternut squash. If you absolutely can’t find fresh sage, you *can* use dried, but you’ll only need about a teaspoon, maybe a teaspoon and a half, because it’s way more concentrated. Just make sure to rub it between your fingers before adding it to really wake up that flavor.

Now, about the squash itself. Butternut is my go-to because it gets so wonderfully creamy and sweet when baked. But if you’re in a pinch, a kabocha squash or even acorn squash could work, though they might have slightly different textures and flavors. For the dairy, heavy cream and whole milk are pretty key for that luscious, rich sauce. If you need to lighten it up a bit, you *could* try half-and-half, but it won’t be quite as decadent. For a dairy-free option, a good quality, unsweetened cashew cream or full-fat coconut milk (the kind in a can, not the carton!) could work, but be aware it will change the flavor profile a little. And for that cheesy topping? Parmesan is classic because it gets nice and bubbly, but Gruyère or even a sharp white cheddar would be delicious too! It’s all about making it your own, kind of like how I love mixing up my grain bowls with things like lemon herb quinoa or a vibrant Mediterranean quinoa salad!

Serving Suggestions for Sage Butternut Squash Gratin

This Sage Butternut Squash Gratin is so versatile, it can truly elevate almost any meal! It’s fantastic alongside a hearty roasted main course, like a perfectly cooked chicken or a tender pot roast. Imagine serving it with my amazing BBQ Chicken Sweet Potato – the sweetness of the potato would play off the squash beautifully. It’s also a stellar partner for something a little more elegant, like a classic ‘Marry Me Chicken’. And honestly? A simple green salad with a bright vinaigrette on the side is all you really need to round out the meal. It’s cozy, comforting, and just plain delicious!

Storage and Reheating Your Sage Butternut Squash Gratin

Okay, so if by some miracle you have any Sage Butternut Squash Gratin left over (which is rare in my house!), storing it is super simple. Just pop it into an airtight container once it’s cooled down a bit and stash it in the fridge. It’ll keep beautifully for about 3-4 days. When you’re ready to reheat, you’ve got a couple of options. For the best texture, I really recommend popping it back into a baking dish, maybe cover it loosely with foil if you want to avoid the top getting *too* crispy, and warm it up in a moderate oven (around 350°F or 175°C) until everything is heated through. Microwaving works too, but it can sometimes make the squash a little softer than you might like, not that it stops me from doing it when I’m in a rush!

Frequently Asked Questions about Sage Butternut Squash Gratin

Got questions about this creamy, dreamy Sage Butternut Squash Gratin? I’ve got answers!

Can I make this gratin ahead of time?

Oh, absolutely! This Sage Butternut Squash Gratin is a fantastic make-ahead dish. You can assemble it right up to the point of baking, cover it tightly with plastic wrap, and keep it in the fridge for up to 24 hours. Just let it sit on the counter for about 20 minutes to take the chill off before popping it into the oven. You might need to add a few extra minutes to the baking time, but it’ll still be just as delicious. It’s perfect if you’re hosting and want to get a head start, kind of like how I prep my quiches or chicken casseroles earlier in the day.

What can I substitute for butternut squash?

Butternut squash is wonderful because it gets so creamy, but if you can’t find it or want to switch things up, a Kabocha squash or an acorn squash are pretty good substitutes. They both have that lovely texture when baked. Just be aware that they might have a slightly different flavor or a bit more moisture. You can even try sweet potatoes if you’re feeling adventurous, but it will lean more dessert-like!

How do I prevent the topping from burning?

That’s a great question! If you notice your Parmesan topping is getting brown too quickly before the squash is perfectly tender, just loosely tent the baking dish with aluminum foil. This creates a little shield that allows the gratin to finish cooking without the cheese getting too dark. Once the squash is tender, you can remove the foil for the last 5-10 minutes if you want to get it extra golden and bubbly again.

Can I use dried sage instead of fresh?

You sure can, though fresh sage really does add a brighter, more vibrant flavor that I just love in this dish. If you’re using dried sage, you’ll want to use about 1 teaspoon to 1.5 teaspoons, as dried herbs are much more concentrated. It’s always a good idea to give dried herbs a little rub between your fingers before adding them to release their oils and flavor!

Nutritional Information (Estimated)

So, while this Sage Butternut Squash Gratin is absolutely divine, it’s good to have a general idea of what’s in it, right? Keep in mind these numbers are just estimates and can totally change depending on the exact ingredients you use and how big your serving is. For example, swapping out heavy cream for a lighter option will change the fat content big time! For one serving, you’re probably looking at around 350 calories, with about 25g of fat. It’s got roughly 25g of carbs and about 8g of protein. Makes sense, right? It’s rich and creamy, but still a good way to add a delicious veggie side to your meal, sort of like how my high-protein chicken parm is a healthier spin on a classic!

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Sage Butternut Squash Gratin

A creamy and savory gratin featuring butternut squash and fresh sage.

  • Author: Mary
  • Prep Time: 20 min
  • Cook Time: 50 min
  • Total Time: 70 min
  • Yield: 6 servings 1x
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Ingredients

Scale
  • 1 medium butternut squash, peeled, seeded, and thinly sliced
  • 1 tablespoon olive oil
  • 1 cup heavy cream
  • 1/2 cup milk
  • 2 cloves garlic, minced
  • 1 tablespoon fresh sage, chopped
  • 1/4 teaspoon salt
  • 1/8 teaspoon black pepper
  • 1/2 cup grated Parmesan cheese

Instructions

  1. Preheat your oven to 375°F (190°C).
  2. Toss the sliced butternut squash with olive oil, salt, and pepper in a bowl.
  3. In a separate bowl, whisk together the heavy cream, milk, minced garlic, and chopped sage.
  4. Arrange the squash slices in a single layer in a baking dish.
  5. Pour the cream mixture over the squash.
  6. Sprinkle the grated Parmesan cheese evenly over the top.
  7. Bake for 40-50 minutes, or until the squash is tender and the top is golden brown.
  8. Let it rest for 5 minutes before serving.

Notes

  • For a crispier topping, you can add breadcrumbs with the Parmesan cheese.
  • Adjust the amount of sage to your preference.

Nutrition

  • Serving Size: 1 serving
  • Calories: 350
  • Sugar: 15g
  • Sodium: 400mg
  • Fat: 25g
  • Saturated Fat: 15g
  • Unsaturated Fat: 10g
  • Trans Fat: 0g
  • Carbohydrates: 25g
  • Fiber: 4g
  • Protein: 8g
  • Cholesterol: 60mg

Keywords: butternut squash gratin, sage, creamy, baked, side dish, vegetarian

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