In the heart of summer, a garden overflowing with vibrant yellow squash can spark creativity in the kitchen. That’s exactly how I stumbled upon my go-to recipe for Cheesy Yellow Squash Casserole—a delightful comfort food that not only showcases the freshness of the season but also makes for an easy, family-friendly dish. It’s the kind of recipe that effortlessly blends creamy textures with tantalizing crunch, turning a simple vegetable into a heartwarming favorite. Whether you’re preparing a quick weeknight dinner or bringing a dish to share at a gathering, this casserole allows you to sneak in healthy ingredients while keeping everyone coming back for seconds. Ready to dive into this cheesy delight? Let’s get cooking!

Why Is This Casserole a Must-Try?
Comforting and Creamy: A warm slice of this Cheesy Yellow Squash Casserole is like a hug on a plate, perfect for any occasion.
Quick to Prepare: Get this delicious dish ready in under an hour, making it ideal for busy weeknights when you crave home-cooked goodness.
Family-Friendly: Kids and adults alike adore the cheesy flavor and tender squash, ensuring everyone’s taste buds are satisfied.
Versatile Dish: Serve it alongside grilled meats or as a centerpiece at potlucks; it pairs wonderfully with any meal. For more ideas, check out my Southern Squash Casserole and Cheesy Chicken Casserole.
Easy Ingredient Swaps: No yellow squash? No problem! Substitute with zucchini or whip up a dairy-free version by using almond milk.
Experience the joy of cooking with this comforting casserole that elevates healthy veggies into a family favorite!
Cheesy Yellow Squash Casserole Ingredients
For the Casserole
• Yellow Squash – Provides the base of the casserole; its mild flavor and tender texture absorb the cheesy mixture. Substitution: Zucchini can be used if yellow squash isn’t available.
• Shredded Cheddar Cheese – Adds richness and creaminess, making the dish indulgent. Use a sharp variety for a more robust flavor.
• Sour Cream – Contributes to the creamy texture and tangy flavor. Can be replaced with Greek yogurt for a healthier option.
• Milk – Helps to create a smooth consistency in the mixture. Any type of milk can work; for a dairy-free version, use almond or soy milk.
• Chopped Onion – Introduces savory depth; you can substitute with shallots for a milder taste.
• Salt and Pepper – Essential for seasoning; adjust to personal taste.
For the Topping
• Breadcrumbs – Provide a crunchy topping that contrasts nicely with the softness of the casserole. Consider using Panko for extra crunch.
• Grated Parmesan Cheese – Enhances the flavor of the topping; adds a salty, nutty element.
• Butter (melted) – Used to bind the breadcrumb topping; can be replaced with olive oil to make it dairy-free.
Step‑by‑Step Instructions for Cheesy Yellow Squash Casserole
Step 1: Preheat the Oven
Begin by preheating your oven to 350°F (175°C). This ensures that your Cheesy Yellow Squash Casserole bakes evenly, leading to that perfect golden topping. While the oven is heating, gather your ingredients and have a greased 9×13 inch baking dish ready for assembly.
Step 2: Mix the Casserole Ingredients
In a large mixing bowl, combine the sliced yellow squash, shredded cheddar cheese, sour cream, milk, chopped onion, salt, and pepper. Stir these ingredients together until well blended, making sure the squash is coated with the creamy mixture. The texture should be thick yet pourable, ready to go into the baking dish.
Step 3: Transfer to Baking Dish
Pour the casserole mixture into the greased baking dish, spreading it evenly across the bottom. Use a spatula to smooth out any uneven areas, ensuring each bite of your Cheesy Yellow Squash Casserole will be filled with that delicious cheesy goodness.
Step 4: Prepare the Topping
In a separate bowl, mix together the breadcrumbs, grated Parmesan cheese, and melted butter. Stir until the breadcrumbs are well coated and crumbly, creating a delightful topping. This mixture provides a welcome crunch that contrasts beautifully with the creamy squash layers.
Step 5: Sprinkle and Bake
Evenly sprinkle the breadcrumb mixture over the squash mixture in the baking dish. Make sure to cover it thoroughly for a crispy finish. Place the dish in the preheated oven and bake for 30-35 minutes, or until the top is golden brown and the squash is tender. You can check for doneness by inserting a fork into the casserole.
Step 6: Cool and Serve
Once baked to perfection, remove the casserole from the oven and allow it to cool for about 5-10 minutes. This resting time helps the flavors meld together and makes it easier to serve. Slice up your Cheesy Yellow Squash Casserole and enjoy the comforting blend of cheesy, creamy goodness at your table!

Make Ahead Options
These Cheesy Yellow Squash Casserole preparations are perfect for busy home cooks looking to save time during the week! You can prepare the casserole mixture (excluding the topping) up to 24 hours in advance. Simply combine the sliced yellow squash, shredded cheddar cheese, sour cream, milk, chopped onion, salt, and pepper, then transfer it to a greased baking dish and cover it tightly with plastic wrap or foil. For best results, refrigerate overnight to maintain the creaminess and freshness. When you’re ready to bake, mix your breadcrumb topping, sprinkle it on top, and bake as directed. You’ll enjoy a delicious home-cooked meal that’s just as comforting and flavorful!
Expert Tips for Cheesy Yellow Squash Casserole
- Use Fresh Ingredients: For the best flavor, use fresh yellow squash. While frozen works in a pinch, nothing beats the taste of fresh produce.
- Avoid Soggy Casserole: Make sure to drain any excess moisture from the squash before mixing. This helps prevent a watery casserole.
- Boost Flavor: Mix in some garlic powder or fresh herbs like thyme or rosemary for an extra layer of flavor in your Cheesy Yellow Squash Casserole.
- Check Cheese Quality: Opt for a sharp cheddar for a more robust and rich flavor that balances well with the creaminess of the dish.
- Mix It Up: Feel free to add cooked meats or different vegetables to the recipe for a personalized twist that satisfies everyone at the table.
How to Store and Freeze Cheesy Yellow Squash Casserole
Fridge: Keep leftover Cheesy Yellow Squash Casserole in an airtight container in the refrigerator for up to 3 days. Reheat individual portions in the microwave or oven until warmed through.
Freezer: For longer storage, freeze the casserole in a tightly sealed container or freezer bag for up to 3 months. Thaw overnight in the fridge before reheating.
Reheating: To reheat, bake at 350°F (175°C) until heated through, approximately 20-25 minutes. Cover with foil to prevent the top from browning too much.
Make-Ahead Tips: Prepare the casserole in advance and store it unbaked in the fridge for up to 24 hours. When ready to serve, simply bake as directed for a fresh and comforting meal.
Cheesy Yellow Squash Casserole Variations
Feel free to get creative with your Cheesy Yellow Squash Casserole and customize it to fit your family’s taste!
-
Dairy-Free: Substitute the sour cream and cheddar cheese with cashew cream and nutritional yeast for a deliciously creamy alternative.
Indulge in the same satisfying texture without the dairy, while still enjoying the rich and comforting flavor of this classic dish. -
Vegetable Medley: Mix in diced bell peppers, zucchinis, or spinach to enhance the nutritional value and burst of color.
Adding these vibrant veggies will not only amp up the taste but also provide a lovely, fresh contrast to the creamy squash. -
Spicy Kick: Add a dice of jalapeños or a sprinkle of red pepper flakes for a fiery twist that elevates the flavor profile.
A bit of heat can transform this comforting dish into a bold experience, perfect for those who love a little spice in their life. -
Herb-Infused: Toss in fresh herbs like basil, thyme, or parsley to brighten the flavors and add an aromatic touch.
Herbs can take your casserole from comforting to gourmet, infusing each bite with delightful freshness that’s simply irresistible. -
Protein Boost: Stir in cooked chicken, ham, or sausage for a hearty, protein-rich version that makes it a complete meal.
This twist turns your casserole into a filling main dish, perfect for family dinners or gatherings where everyone craves a hearty bite. -
Crunchy Topping: Try substituting regular breadcrumbs with crushed cornflakes or fried onions for a delightful crunch.
This variation adds unexpected texture and flavor, giving a satisfying crunch on top of the creamy casserole that everyone will love. -
Creamy Mushroom Twist: Incorporate sautéed mushrooms for an earthy depth that pairs beautifully with the cheese and squash.
Mushrooms create a wonderful umami flavor that elevates the entire dish, making it feel even more comforting and wholesome.
For more tasty inspiration, try pairing this casserole with my French Toast Casserole for brunch or the delightful Corn Chicken Casserole for dinner!
What to Serve with Cheesy Yellow Squash Casserole?
Pairing your meal with complementary side dishes can elevate the dining experience into something truly special.
-
Grilled Chicken: The smoky, charred flavor of grilled chicken pairs perfectly with the creamy, cheesy notes of the casserole, creating a balanced plate.
-
Garden Salad: A fresh garden salad with a tangy vinaigrette provides a crisp contrast, enhancing the richness of the casserole while adding a refreshing crunch.
-
Garlic Bread: Warm, buttery garlic bread is an irresistible addition that complements the casserole’s flavors and adds delightful texture to your meal experience.
-
Roasted Vegetables: Roasting vegetables like carrots and bell peppers brings out their natural sweetness, offering a vibrant side that harmonizes with the casserole’s creamy taste.
-
Corn on the Cob: Juicy, sweet corn adds a touch of summer and provides a fun, crunchy element that balances the soft textures of the dish.
-
Apple Crisp: For dessert, a warm apple crisp delivers delightful contrasts of sweet and tart flavors, wrapping up your meal with heartfelt coziness.
These delightful pairings will turn your Cheesy Yellow Squash Casserole into a memorable feast for family and friends!

Cheesy Yellow Squash Casserole Recipe FAQs
How do I choose ripe yellow squash?
Absolutely! Look for yellow squash that is firm, smooth, and free from dark spots or blemishes. The skin should be shiny, indicating freshness. Avoid any with soft spots or visible signs of decay, as they can affect the overall flavor and texture of your Cheesy Yellow Squash Casserole.
How should I store leftover Cheesy Yellow Squash Casserole?
Very simply! Keep any leftovers in an airtight container, and you can store them in the refrigerator for up to 3 days. Reheat portions in the microwave or the oven to enjoy that comforting taste again. Just make sure to check for any signs of spoilage before eating!
Can I freeze Cheesy Yellow Squash Casserole?
Absolutely! To freeze, let the casserole cool completely and then transfer it to a tightly sealed freezer-safe container or bag. It will keep well for up to 3 months. When you’re ready to enjoy it again, thaw it in the fridge overnight and then bake at 350°F (175°C) until heated thoroughly, about 20-25 minutes.
What if my Cheesy Yellow Squash Casserole turns out watery?
No one wants a soggy casserole! If you find your dish is watery, it’s likely due to excess moisture in the squash. To avoid this, slice the squash and sprinkle it with salt, letting it drain for about 15-20 minutes before mixing it into the casserole. This method helps draw out moisture and keeps your casserole perfectly creamy.
Can I make this dish dairy-free?
Very much so! For a dairy-free version of your Cheesy Yellow Squash Casserole, swap out the sour cream for a plant-based yogurt, and use almond or soy milk instead of regular milk. You can also find dairy-free cheese options that melt well and put a delicious spin on this classic comfort food.
Is there a way to add extra nutrition to the casserole?
Absolutely! You can easily sneak in extra nutrition by adding chopped spinach, diced bell peppers, or even cooked lentils. Mixing in these additions not only enhances the flavor but also increases the overall nutrient content, making your Cheesy Yellow Squash Casserole even more delightful!

Cheesy Yellow Squash Casserole: A Family Comfort Food Delight
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C) and prepare a greased 9x13 inch baking dish.
- In a large bowl, mix together the sliced yellow squash, shredded cheddar cheese, sour cream, milk, chopped onion, salt, and pepper until well blended.
- Transfer the mixture to the greased baking dish, spreading it evenly.
- In a separate bowl, combine breadcrumbs, grated Parmesan cheese, and melted butter, mixing until crumbly.
- Sprinkle the breadcrumb mixture over the squash mixture and bake for 30-35 minutes until golden brown.
- Let the casserole cool for 5-10 minutes before serving.

Leave a Reply