Summer Squash & Sweet Onion Casserole

Classic summer vegetables - zucchini, yellow squash, and sweet onions come together in this cheesy and delicious casserole. It will become your go-to dish to bring to barbeques and cookouts and will be the talk of the town!

  • 3 cups large yellow squash, diced
  • 3 cups zucchini, diced
  • 1 Large sweet onion, coarsely chopped
  • 1 Tbsp vegetable oil
  • 4 Tbsp butter
  • 1 cup mayonnaise
  • 1½ cups cheddar cheese, shredded
  • ½ cup parmesan cheese, grated
  • 1¼ cups butter crackers, crushed
  • ½ tsp paprika
  • ½ tsp garlic powder
  • salt and pepper, to taste
  1. Preheat oven to 350ºF (177°C).
  2. Heat the vegetable oil in a large skillet and cook the onions over medium to low heat until lightly brown.
  3. Add the squash and zucchini, season with salt and pepper to taste and cook until the squash is tender, about 8 to 10 minutes.
  4. Remove the skillet from the heat and stir in the mayonnaise, 1 cup of cheddar cheese, 1 cup of crumbled crackers, paprika, and garlic powder.
  5. Pour the mixture into a 1½ quart baking dish.
  6. Sprinkle with remaining cheese and top with remaining crushed butter crackers.
  7. Bake until the casserole is bubbly around edges, about 25 minutes.
  8. Remove the casserole from the oven and serve warm.

If you like this recipe, try our Green Bean Casserole with Fried Sweet Onions!

Prep Time

20 minutes

Cook Time

35 minutes



Tags: Dinner