This cozy slow cooker squash casserole is a breeze to make! Filled with tender squash and topped with crispy Ritz crackers, it’s a comforting dish for any meal.
I love how everything cooks together in the slow cooker, allowing the flavors to blend perfectly. Plus, who can resist that crunchy topping? It’s just like a warm hug on a plate!
Key Ingredients & Substitutions
Yellow Squash: Fresh yellow squash is the star of this casserole. You can also use zucchini for a different flavor, or mix both for added color and taste.
Onion: For a milder taste, consider using sweet onions or shallots instead of regular onions. They add a nice subtle sweetness!
Sour Cream: If you’re looking for a lighter option, Greek yogurt works great as a substitute for sour cream. It will still give the dish a creamy texture.
Cheddar Cheese: While sharp cheddar is my favorite for its flavor, you can mix in other cheeses like Monterey Jack or Colby for a different taste. Vegan cheese also works well for a dairy-free version.
Ritz Crackers: If you’re in a pinch, any buttery cracker can replace Ritz. Try saltines or even panko breadcrumbs for a crunchier topping!
How Do I Make Sure My Squash Casserole is Creamy and Flavorful?
Getting the right texture and flavor is key in this casserole! Here’s how to ensure it turns out perfectly:
- Start by slicing the squash evenly so they cook at the same rate. Thin slices will blend better with the other ingredients.
- Mix the ingredients well before adding them to the slow cooker. This ensures that every bite has a nice balance of flavors.
- If you want extra flavor, sauté the onions before mixing them in. This can enhance their sweetness, giving your casserole an even better taste.
- Let the casserole cool for a few minutes after cooking. This helps it set up nicely for serving!

Easy Slow Cooker Squash Casserole With Ritz Crackers
Ingredients You’ll Need:
- 4 cups yellow squash, thinly sliced
- 1 cup onion, finely chopped
- 1 cup sour cream
- 1 cup shredded cheddar cheese
- 1/2 cup mayonnaise
- 1/2 teaspoon black pepper
- 1/2 teaspoon salt
- 1 cup Ritz crackers, crushed
- 2 tablespoons butter, melted
How Much Time Will You Need?
This delicious casserole takes about 15 minutes of prep time and will cook in your slow cooker for 4 to 6 hours. Just set it and forget it while the flavors meld together, making a warm, comforting dish!
Step-by-Step Instructions:
1. Prepare the Slow Cooker:
Start by greasing the inside of your slow cooker with cooking spray or a little butter. This will help prevent the casserole from sticking.
2. Mix the Main Ingredients:
In a large bowl, combine the sliced yellow squash, chopped onion, sour cream, shredded cheddar cheese, mayonnaise, salt, and black pepper. Mix everything together until it’s nice and even. This is where all the yummy flavors blend!
3. Load the Slow Cooker:
Take the mixture and transfer it into the prepared slow cooker. Spread it out evenly to ensure it cooks properly.
4. Prepare the Topping:
In a separate bowl, take the crushed Ritz crackers and mix them with the melted butter. Stir until all the crackers are well coated with butter for that perfect crispy topping.
5. Top it Off:
Sprinkle the buttery Ritz cracker mixture evenly over the squash mixture in the slow cooker. This will create a tasty, crunchy layer on top.
6. Cook and Wait:
Cover your slow cooker and cook on low for 4 to 6 hours. You’ll know it’s done when the squash is tender, and the casserole is bubbly with a golden and crispy topping.
7. Serve Up and Enjoy:
Once it’s ready, carefully remove the lid (watch out for the hot steam!). Serve your delicious squash casserole hot, and enjoy this comforting dish with family and friends!

Can I Use Different Types of Squash?
Absolutely! You can substitute zucchini for yellow squash or even mix both for added flavor and color. Just make sure to adjust the cooking time a bit if using a firmer squash.
How Do I Store Leftovers?
Store any leftover casserole in an airtight container in the fridge for up to 3 days. To reheat, warm it gently in the microwave or reheat in the oven at 350°F until heated through.
Can I Prepare This Casserole Ahead of Time?
Yes! You can assemble the casserole the night before and store it in the fridge. Just add an extra 30 minutes to the cooking time if you’re starting from cold.
How Can I Make This Recipe Healthier?
To lighten it up, you can use low-fat sour cream and mayonnaise, or substitute Greek yogurt for the sour cream. Adding extra veggies like spinach or bell peppers can also boost its nutritional value!



