Spicy Squash Casserole with Leftover Cornbread and Green Chiles

Pinterest Hidden Image

Sneak Peek: Serve this Spicy Squash Casserole with Leftover Cornbread and Green Chiles as a vegetable side dish or vegetarian entree. No canned soups.

summer squash casserole on a plate with smoked sausagePin

As an Amazon Associate, I earn from qualifying purchases.

If you are here because you are blessed with an oversupply of summer squash, congratulations. This recipe offers something different from the usual squash casserole.

If you are here because you have leftover cornbread, this recipe is perfect for recycling it, particularly if you have at least 2 cups. You can substitute store-bought stuffing leftover cornbread

Many years ago, I tasted a version of this Summer Squash Casserole made with leftover cornbread. It was so delicious that I never forgot about it.

Over the years, I’ve perfected and tweaked the recipe. It’s like a marriage between cornbread dressing and a Tex-Mex summer squash casserole. The green chiles, corn, and shredded cheese take it over the top.

Ingredients and Substitutions

ingredients to make this squash sidedish.Pin
  • YELLOW SQUASH: Yellow squash is considered a summer squash. It is somewhat sweeter than zucchini.

    Try to buy the smaller yellow or summer squash in the store. If you grow them yourself, be sure to pick them before they get too big and tough. Peeling is not necessary. In case you have more squash than you know what to do with, check out these Simple Squash Patties, Baked Yellow Squash Soufflé, and Baked Parmesan Squash.
  • ONIONS: Yellow or white onions would both be appropriate in this recipe.
  • BELL PEPPERS: Use red, yellow, or orange peppers. Green peppers are not as sweet as the other colors and have their own distinctive flavor. Suit yourself. Using many colors adds visual appeal to this recipe.

    ***Did you know you can chop and freeze bell peppers? Wash, seed, and chop. Place them into a plastic bag and drop them into the freezer.
  • MUSHROOMS: White button mushrooms are the easiest to come by in my area, so that’s what I use. Canned mushroom bits and pieces are the cheapest way to go. Leave them out if you don’t like or can’t buy mushrooms.
  • MILK: Use fat-free, low-fat, whole milk, or evaporated milk.
  • CORN: This is a very important ingredient in my book. Fresh corn cut off the cob is the best, of course. But I rarely have that on hand. Frozen corn is almost as good. Use canned corn as a last resort.
  • GREEN CHILES: Green chiles add spice to this recipe. Start with a 4 oz. jar of chopped chiles (or less if you’re a bit timid when it comes to peppers). Add more chiles if you like spicy food. A dash of Sriracha sauce will also add some quick zip.
  • STUFFING: Use boxed cornbread stuffing mix like you would use at Thanksgiving. Buying stuffing from the store (Stove Top or Pepperidge Farms are good brands) is the easiest choice. It’s high in salt and other seasonings, so taste the casserole before adding any salt.
    No stuffing available? I often use leftover dried-out cornbread. I keep cornbread in my freezer, saved from serving my favorite cornbread recipe since it makes too much for the two of us.

    See the notes in the recipe for how to dry and crumble homemade cornbread.
  • CHEESE: The recipe calls for one cup of shredded Cheddar cheese or Monterrey Jack. Use Pepper Jack if you want more spice. You can either stir all of the cheese into the casserole before baking or hold back half of it to sprinkle on top of the casserole in the last 5 minutes of baking.
Summer Squash Casserole in a serving dish with a serving spoonPin

How to make Yellow Summer Squash Casserole with Green Chiles:

Dicing the yellow squash.Pin
Fill a microwave-safe glass Pyrex container with chunks of squash. (It does not need to be peeled.) Cover with plastic wrap or a lid. Cook in the microwave on HIGH until tender. (Times will vary. Start with 8-9 minutes.)
draining the yellow squash.Pin
Use a potato masher or large fork to press on the cooked squash to squeeze out as much moisture as possible.
chopped onions and bell peppers.Pin
Cut up onions and your choice of bell peppers.
sauteing veggies on the stove.Pin
Sauté the vegetables in a large skillet or pan over medium-high heat using 2 tablespoons of melted butter until softened.
mushroom quarters.Pin
Add mushrooms cut into small pieces to the skillet and continue frying. Add cumin after the mushrooms soften.
sprinkling flour over veggies.Pin
Sprinkle flour over vegetables in the skillet and stir until flour disappears.
adding milk to the mixture.Pin
Add milk.
stirring the sauce until thickened.Pin
Stir until smooth and thickened.
adding ingredients to a large pan.Pin
Add corn, green chiles, and cooked, smashed, and drained summer squash. Stir the squash mixture slightly.
seasoning vegetable mixture.Pin
Check the taste (it’s safe). Add salt and pepper if necessary.
Folding in shredded cheese and leftover cornbreadPin
Fold in the dry stuffing mix or leftover crumbled cornbread and shredded cheese.
casserole ready to put in the oven.Pin
Pour into a casserole baking dish or pan and bake in a 400˚F preheated oven.
Green Chili and Squash Dressing--ready to eatPin
Optional: Sprinkle more cheese on top 5 minutes before the dressing is ready to take out of the oven.

FAQ about this Spicy Yellow Squash Cassserole:

Can I make squash casserole ahead of time?

You can make this earlier in the day, refrigerate and bake. However, I prefer to bake it the same day I assemble it so the cornbread won’t get too mushy.

Can I freeze this recipe?

Yes. Because of the cornbread, I recommend you use it within a month.

How spicy is this recipe?

The spiciness level depends on the green chiles. Some are much spicier than others. Reduce the number of chiles or leave them out if you’re not a fan of spicy food.

Parting thoughts: Vegetable mixtures can be a little scary, but I think you will enjoy this casserole if you like Tex-Mex or spicy food. I love to eat this with grilled smoked sausage. It’s one of my favorite comfort menus. If you love green chiles, try them with eggplant in this Spicy Eggplant Recipe with Green Chiles.

If you have questions or suggestions, email me privately for a quick answer: Paula at saladinajar.com. Hope to see you again soon! 

summer squash casserole on a plate with smoked sausagePin

Yellow Squash Casserole with Leftover Cornbread and Green Chiles

Paula Rhodes
This is a spicy mixture of summer squash, corn, green chiles, and leftover cornbread. Southern cuisine combined with Tex-Mex flavors makes a memorable side dish or vegetarian entree.

Rate this recipe here

4.50 from 12 votes
Prep Time 25 minutes
Cook Time 20 minutes
Total Time 45 minutes
Course Vegetables and Side Dishes
Cuisine Tex-Mex
Servings 10 servings
Calories 272 kcal



  • 4 cups summer squash - chopped (3 small squash or 2 medium squash)
  • 2 tablespoons butter
  • ½ medium onion - chopped
  • ½ cup red or green bell peppers - chopped
  • 8 ounces white mushrooms - cut into small slices
  • ¼ teaspoon cumin
  • 1 tablespoon unbleached all-purpose flour
  • 1 cup milk
  • 1 cup frozen corn
  • 4 ounces chopped green chiles - more or less depending on your taste
  • 1 cup stuffing mix or leftover cornbread - (See the notes if using cornbread)
  • ½ teaspoon salt
  • Freshly ground black pepper
  • 1 cup Cheddar or Monterrey jack cheese, shredded - 4 ounces


  • Cook 4 C chopped summer squash with a tablespoon of added water. Cover and microwave on HIGH for about 8-9 minutes. Mash squash with a fork or masher and drain well. Set aside.
  • While the squash cooks, sauté chopped onions (half an onion) and ½ C of bell peppers in 1 tablespoon of butter melted in a large skillet over medium heat. After the vegetables soften, add 8 ounces of sliced mushrooms and cook another 2-3 minutes. Add 1/4 teaspoon of cumin.
  • Add 1 tablespoon of flour to softened veggies. Cook and stir for about two minutes, then add 1 cup of milk (whole or low-fat) to make a sauce. Stir and cook on medium-low until thickened like gravy.
  • Add 1 cup of corn, 1 4-oz can of green chiles (drained), and cooked, drained, squash. Season to taste with ½ teaspoon salt (only if needed, storebought stuffing can be salty already) and 1/4 teaspoon of pepper. Fold in the dried cornbread and cheese. If you prefer, save half the cheese to sprinkle on top in step 5.
  • Place into a greased 1-1/2 quart casserole dish. Place into a 400˚F (200˚C) oven for 20 minutes or until heated through. Sprinkle the remaining cheese on top during the last 5 minutes.


How to dry out cornbread: Crumble cornbread with your hands and let it dry on the counter for a few hours. You can hasten the process using an oven at 300˚F until the cornbread is dry. It isn’t easy to specify a time as it will depend on how moist the cornbread is. Mine usually takes 15 minutes.


Serving: 1 | Calories: 272kcal | Carbohydrates: 35g | Protein: 9g | Fat: 11g | Saturated Fat: 6g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 1g | Cholesterol: 47mg | Sodium: 549mg | Potassium: 384mg | Fiber: 3g | Sugar: 11g | Vitamin A: 625IU | Vitamin C: 23mg | Calcium: 188mg | Iron: 2mg
Keyword summer squash casserole, spicy squash dressing, green chiles, squash casserole with stuffing
Did you try this recipe?If you loved it, don’t forget to leave a 5-star rating 🌟🌟🌟🌟🌟 at the top of the recipe card. Thanks so much for taking the time to do that!

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe Rating


  1. It sounds good, but I don’t understand why the title says spicy. There is nothing spicy in the recipe. Is something missing??

    1. Hi Theresa,

      Green chilis can be quite spicy. Use the hot ones if you want really spicy. We prefer the mild ones.

  2. Now that sounds good. Too bad I only make cornbread at Thanksgiving to put in the dressing.

  3. looks good! What do I do with leftover cornbread? Well, we usually don’t have any leftover, so I wouldn’t know. 🙂