Jump to Recipe Print RecipeAs I stirred the pot of bubbling deliciousness, the inviting aroma of my Cheesy Butternut Squash Casserole wafted through the kitchen, instantly warming my heart. This cozy dish brings together creamy, nutty flavors with a delightful crunch that transforms any meal into a celebration. It’s vegetarian and gluten-free, making it a perfect holiday side that everyone can enjoy. Whether you’re satisfying your craving for comfort food or impressing guests at a festive gathering, this casserole is an effortless crowd-pleaser. Plus, with the option to add savory Italian sausage or chicken sausage, it can easily become a hearty entrée. Are you ready to discover the joy of cozy cooking? Let’s dive into the recipe and make some magic happen! What Makes This Casserole a Must-Try? Irresistibly, this Cheesy Butternut Squash Casserole combines rich, creamy textures with a crunchy topping that will leave you wanting more. Flexibility is key: add sausage for a satisfying entrée or keep it vegetarian for a festive side. Flavor-packed, the blend of kale and cheeses enhances the sweetness of the squash, making it appealing to everyone. Make-ahead friendly, prep it in advance for stress-free entertaining. This casserole not only warms the heart but becomes a stunning centerpiece at any table, ensuring your gatherings are filled with delicious memories! If you enjoy cozy dishes, you may also want to try my Mediterranean Vegetable Casserole for another delightful flavor experience. Cheesy Butternut Squash Casserole Ingredients • Prepare yourself to indulge in a vibrant mix of flavors and textures! For the Filling • Extra-virgin olive oil – Adds richness and moisture; substitute with avocado oil for a neutral flavor. • Yellow onion – Provides an aromatic base and sweetness; can be replaced with shallots for a milder taste. • Garlic cloves – Enhances flavor with its robust aroma; minced garlic works best. • Crushed red pepper flakes – Adds heat and spice; omit for a milder dish or replace with black pepper. • Lacinato kale – Contributes nutrition and color; swap with spinach or Swiss chard for a different flavor. • Heavy cream – Provides creaminess to the filling; use coconut cream for a dairy-free option. • Parmesan cheese – Offers a savory tang; good substitute is Pecorino Romano. • Dijon mustard – Adds depth and a little bite; yellow mustard can replace it for a lighter touch. • Fresh thyme – Imparts herby freshness; dried thyme can be used as a substitute (about 1/3 the amount). • Kosher salt & black pepper – Enhances flavors; adjust to your taste preferences. • Butternut squash – The star of the dish, adding sweetness and body; substitute with sweet potatoes if desired. • Gruyere or gouda cheese – Adds creaminess and nuttiness; cheddar can be used for a sharper flavor. For the Topping • Sourdough bread – Provides texture and crunch; any crusty bread can work, or use gluten-free options. • Chopped walnuts – Offers crunchy texture and complements the dish; can replace with pecans or almonds for variety. Embrace this Cheesy Butternut Squash Casserole that brings comfort and joy to every bite! Step‑by‑Step Instructions for Cheesy Butternut Squash Casserole Step 1: Preheat the Oven Begin by preheating your oven to 425ºF (220ºC). This step is crucial for achieving that perfect golden-brown finish on your Cheesy Butternut Squash Casserole. While the oven heats, prepare your ingredients so everything will be ready for assembly. Step 2: Cook the Aromatics In a large sauté pan, heat 2 tablespoons of extra-virgin olive oil over medium heat. Once shimmering, add finely chopped yellow onion and sauté for about 7-8 minutes until they become soft and translucent. Stir in minced garlic and crushed red pepper flakes, cooking for an additional 2 minutes until fragrant and slightly golden. Step 3: Prepare the Kale Filling Add 4 cups of Lacinato kale to the pan, stirring for about 2-3 minutes, until the kale wilts and softens. Next, pour in 1 cup of heavy cream and add ⅓ cup of grated Parmesan cheese, along with Dijon mustard, fresh thyme, salt, and black pepper. Let the mixture simmer for 3-5 minutes, until it thickens slightly and the flavors meld beautifully. Step 4: Assemble the Casserole Grease a 3-quart baking dish with a drizzle of olive oil, then layer the peeled and cubed butternut squash evenly across the bottom. Carefully pour the kale mixture over the squash, making sure to distribute it evenly. Finish by sprinkling shredded Gruyere cheese over the top, creating a deliciously cheesy layer. Step 5: Bake Covered Loosely cover your casserole dish with aluminum foil and place it in the preheated oven. Bake for 30 minutes, then check for doneness by piercing the butternut squash with a fork; it should be fork-tender. If needed, continue to bake for an additional 10 minutes. Step 6: Prepare the Crunchy Topping While the casserole bakes, prepare the topping. In a mixing bowl, combine torn sourdough bread pieces with chopped walnuts, the remaining Parmesan cheese, 2 tablespoons of olive oil, and a pinch of salt. Ensure the bread pieces are evenly coated with oil for that perfect crispiness. Step 7: Final Bake After removing the foil from the casserole, sprinkle the topping mixture generously over the cheesy butternut squash casserole. Return the dish to the oven and bake uncovered for another 20 minutes, until the squash is tender and the topping looks golden brown. For an extra crispy finish, broil for 1-2 minutes, watching closely to avoid burning. Step 8: Cool Before Serving Once baked to perfection, remove the casserole from the oven and let it cool for 5-10 minutes. This resting time allows the flavors to settle and makes serving easier while ensuring everyone enjoys the creamy, cheesy goodness of your Cheesy Butternut Squash Casserole. What to Serve with Cheesy Butternut Squash Casserole The perfect meal is just a few pairings away from transforming your cheesy delight into an unforgettable feast. Herbed Roasted Chicken: Juicy and flavorful, this dish pairs beautifully, adding a delicious protein to complement the creamy casserole. Mixed Green Salad: A fresh, crisp salad dressed in a light vinaigrette offers a refreshing contrast to the rich casserole. It balances the meal wonderfully. Garlic Breadsticks: Soft and warm, these breadsticks add delightful texture and a hint of garlic that’s hard to resist alongside the casserole. Cranberry Sauce: Bright and tart, a spoonful of this adds a seasonal twist, enhancing the flavors of both the squash and any roasted meats. Sautéed Green Beans: Lightly sautéed with lemon and garlic, they bring a lovely crunch and vibrant color, enhancing the overall dining experience. Chardonnay: A glass of chilled Chardonnay complements the savory flavors with its crisp acidity, tying all elements of the meal together beautifully. Apple Crisp: To finish the meal on a sweet note, an apple crisp delivers warm, spiced fruit that harmonizes perfectly with the creamy casserole. Make Ahead Options These Cheesy Butternut Squash Casserole preparations are perfect for busy weeknights or holiday gatherings! You can peel and cube the butternut squash up to 3 days in advance; simply refrigerate it in an airtight container to prevent browning. Additionally, the creamy kale filling can be made up to 24 hours ahead—just store it in the fridge as well. When you’re ready to serve, layer the squash and filling in the baking dish, top it with the crunchy mixture, and bake it according to the instructions. This way, your casserole will be just as delicious, saving you time without sacrificing flavor! Cheesy Butternut Squash Casserole Variations Feel free to personalize your casserole with these creative ideas that will uplift its flavors and nutritional profile! Protein-Packed: Stir in browned Italian sausage or chicken sausage for a hearty, filling meal. The savory meat complements the sweetness of the squash beautifully and gives it a satisfying boost. Dairy-Free Delight: Swap heavy cream for coconut cream and use nutritional yeast instead of Parmesan for a creamy vegan version. The coconut adds a subtle sweetness that works wonderfully with the squash. Cheesy Twist: Experiment with different cheeses! Try using sharp cheddar or mozzarella for a completely different flavor profile. Each cheese brings its unique character to the dish, making every bite delightful. Spicy Kick: Add chopped jalapeños or a dash of hot sauce to the kale mixture for an extra layer of heat. This spicy variant can transform your casserole into a thrilling adventure for the taste buds! Gluten-Free Option: Use gluten-free bread for the crunchy topping. This simple swap ensures everyone can enjoy the delicious texture without missing out on flavor. Herb-Infused: Mix in fresh herbs like basil or rosemary with the kale filling for an aromatic twist. The herbs brighten the dish and add a fresh, garden feel. Vegetable Boost: Incorporate other vegetables like roasted red peppers or mushrooms into the kale mixture for added nutrition and texture. You’ll create a wonderful surprise that elevates every forkful. Remember, each twist brings you closer to your taste preferences! And if you relish comforting casseroles, you might enjoy my delightful Tater Tot Casserole or the savory Dorito Casserole as well. Happy cooking! How to Store and Freeze Cheesy Butternut Squash Casserole Fridge: Store leftovers in an airtight container for up to 5 days. Ensure the casserole cools completely before sealing to maintain freshness. Freezer: For longer storage, freeze the casserole tightly wrapped in plastic wrap and foil. It can last for up to 3 months; remember to label it with the date! Reheating: To enjoy your Cheesy Butternut Squash Casserole, thaw overnight in the fridge, then reheat in a 350ºF oven until heated through (about 30-40 minutes). Make-ahead: Prep the casserole a day in advance and bake it on the day of serving for all the cozy flavors with less rush! Expert Tips for Cheesy Butternut Squash Casserole Prep Squash Early: Peel and cube the butternut squash ahead of time and store it in the fridge for up to 3 days to save time during meal prep. Sauté Kale Well: Ensure the kale is well-sautéed before adding cream; this helps it blend beautifully into the casserole and prevents a tough texture. Taste as You Go: Always taste the kale mixture while cooking. Adjust salt and pepper to enhance the flavors fully; no one likes bland casseroles! Cover to Steam: Cover the casserole with foil initially to allow the squash to steam; this ensures it’s tender before the topping gets crispy. Topping Choices: Get creative with the topping! Feel free to swap walnuts for pecans or almonds for an exciting twist in your Cheesy Butternut Squash Casserole. Reheat Properly: When reheating, use the oven for the best texture; microwave can make it soggy. Enjoy every warm, creamy bite! Cheesy Butternut Squash Casserole Recipe FAQs How do I choose ripe butternut squash? Look for butternut squash that has a matte finish and a firm exterior. It should feel heavy for its size, with no dark spots or soft areas. A ripe squash will have a deep, even tan color and should be solid when you tap it. Can I store leftover casserole, and how long will it last? Absolutely! Store any leftover Cheesy Butternut Squash Casserole in an airtight container in the refrigerator for up to 5 days. Make sure it has cooled completely before sealing it, as this helps keep the flavors fresh and prevents sogginess. What is the best way to freeze this casserole? To freeze your casserole, let it cool completely, then tightly wrap it in plastic wrap and foil or place it in a freezer-safe container. It can last for up to 3 months in the freezer. When you’re ready to eat, thaw it overnight in the fridge, then reheat in a 350ºF oven until heated through, usually about 30-40 minutes. What should I do if the casserole turns out too watery? If your casserole is too watery, it could be that the squash released extra moisture. You can address this by baking it uncovered for an additional 10-15 minutes to allow some of the moisture to evaporate. Stir in a bit of extra cheese or breadcrumbs to help absorb excess liquid and enhance the overall flavor. Are there any dietary considerations with this recipe? Great question! This casserole is vegetarian and gluten-free when made with gluten-free bread. However, if you have nut allergies, be cautious about the walnuts in the topping and consider omitting or replacing them with seeds like pumpkin or sunflower seeds to keep that delightful crunch. Can I make this casserole in advance? Yes, you can absolutely prep the Cheesy Butternut Squash Casserole a day ahead of time! Just assemble it according to the instructions, cover it tightly with foil, and refrigerate it. Bake it fresh on the day of serving for all the cozy flavors while minimizing the stress of cooking. Irresistibly Cheesy Butternut Squash Casserole Delight Delight in this Cheesy Butternut Squash Casserole that brings together creamy textures with a crunchy topping, making it a must-try dish for any occasion. Print Recipe Pin Recipe Prep Time 30 minutes minsCook Time 1 hour hrCooling Time 10 minutes minsTotal Time 1 hour hr 40 minutes mins Servings: 8 servingsCourse: DinnerCuisine: VegetarianCalories: 320 Ingredients Equipment Method Nutrition Notes Ingredients 1x2x3x? For the Filling2 tablespoons extra-virgin olive oil Substitute with avocado oil for a neutral flavor.1 cup yellow onion, chopped Can be replaced with shallots for a milder taste.3 cloves garlic, minced Enhances flavor with its robust aroma.1 teaspoon crushed red pepper flakes Omit for a milder dish or replace with black pepper.4 cups Lacinato kale, chopped Swap with spinach or Swiss chard for a different flavor.1 cup heavy cream Use coconut cream for a dairy-free option.⅓ cup Parmesan cheese, grated Good substitute is Pecorino Romano.1 tablespoon Dijon mustard Yellow mustard can replace it for a lighter touch.1 teaspoon fresh thyme Dried thyme can be used as a substitute (about 1/3 the amount).to taste Kosher salt & black pepper Enhances flavors; adjust to your taste preferences.4 cups butternut squash, peeled and cubed Substitute with sweet potatoes if desired.1 cup Gruyere or gouda cheese, shredded Cheddar can be used for a sharper flavor.For the Topping2 cups sourdough bread, torn Any crusty bread can work, or use gluten-free options.1 cup chopped walnuts Can replace with pecans or almonds for variety. Equipment Large Sauté Pan3-quart baking dishMixing bowl Method Step-by-Step InstructionsPreheat your oven to 425ºF (220ºC). Prepare your ingredients while the oven heats.In a large sauté pan, heat extra-virgin olive oil over medium heat. Add chopped yellow onion and sauté for about 7-8 minutes until soft and translucent. Stir in minced garlic and crushed red pepper flakes for 2 more minutes.Add Lacinato kale, stirring for about 2-3 minutes until wilted. Pour in heavy cream and add grated Parmesan, Dijon mustard, fresh thyme, salt, and black pepper. Let simmer for 3-5 minutes.Grease a 3-quart baking dish with olive oil. Layer the cubed butternut squash evenly across the bottom. Pour the kale mixture over the squash and sprinkle with shredded Gruyere cheese.Cover the casserole dish loosely with aluminum foil and bake for 30 minutes. Check for doneness by piercing the squash with a fork; it should be tender. Bake for an additional 10 minutes if needed.Prepare the topping by combining torn sourdough bread with chopped walnuts, remaining Parmesan, olive oil, and a pinch of salt in a mixing bowl.After baking, remove the foil and sprinkle the topping evenly over the casserole. Return to the oven and bake uncovered for another 20 minutes. Broil for 1-2 minutes for extra crispiness if desired.Allow the casserole to cool for 5-10 minutes before serving to let the flavors settle and make it easier to serve. Nutrition Serving: 1servingCalories: 320kcalCarbohydrates: 22gProtein: 7gFat: 24gSaturated Fat: 10gPolyunsaturated Fat: 3gMonounsaturated Fat: 9gCholesterol: 40mgSodium: 450mgPotassium: 600mgFiber: 4gSugar: 6gVitamin A: 5000IUVitamin C: 15mgCalcium: 250mgIron: 2mg NotesPrep the butternut squash ahead of time and store it in the fridge. Taste the kale mixture while cooking to adjust seasoning. Use the oven for reheating leftovers for the best texture. Tried this recipe?Let us know how it was!
