
Kitchen notes · a little help before you start
Yellow Squash Casserole
Yellow Squash Casserole is made with yellow squash, yellow onion, and sour cream.
- Prep
- 25 min
- Cook
- 35 min
- Total
- 60 min
- Original yield
- Serves 12
- Ingredients
- 13 listed
Make it part of your week
Recipe categories & planning details
- Meal type
- Sides
- Cuisine
- American
- Preparation & total time
- Prep: 16–30 minutes · Total: 31–60 minutes
A few quick notes
1. Check when to cover
Follow the covered and uncovered stages in their stated order.
2. Preheat as directed
Have the oven at the specified temperature for its cooking step.
3. Prepare the first additions
Set out the ingredients needed for the first cooking step.
Get to know the ingredients
yellow squash (preferably small to medium; , sliced into rounds about 1/3-inch thick)
In the method: Spray a 13 by 9-inch baking dish with non-stick cooking spray.
sour cream
In the method: While squash is boiling in a mixing bowl stir together sour cream, egg, 1/3 cup breadcrumbs, cheddar cheese, 1/2 cup parmesan cheese, parsley and chives.
large egg
In the method: Preheat oven to 350 degrees.
Let’s make it
Choose your servings, then check things off as you go.
Original recipe: Serves 12. Original quantities shown.
Check ingredients as you prepare them. These checks stay on this page.
Ingredient note
Source: 4 lbs. yellow squash (preferably small to medium; , sliced into rounds about 1/3-inch thick)Ingredient note
Source: 1 cup sour creamIngredient note
Source: 1 large eggIngredient note
Source: 3/4 cup + 1/3 cup panko breadcrumbs, (divided)Ingredient note
Source: 1 1/4 cups shredded sharp cheddar cheeseIngredient note
Source: 1/2 cup chopped parsleyIngredient note
Source: 2 Tbsp dried chivesIngredient note
Source: 3 Tbsp butter, (divided)Ingredient note
Source: 1 medium yellow onion, (chopped)Ingredient note
Source: 2 garlic cloves, (minced 2 tsp)Ingredient note
Source: 1 cup finely shredded parmesan cheese, (divided)Ingredient note
Source seasoning: Salt and freshly ground black pepperIngredient note
Source seasoning: Salt and freshly ground black pepper
How to make it
0 of 8 steps completeMake room for Yellow Squash Casserole
Review ingredients in your pantry before anything is added. Meal plans use your household size; grocery-only additions use the servings selected above.
The last little job
Finish as directed
Serve casserole warm garnished with a little chopped parsley if desired.
A little more help as you go
Watch the broiling step
Follow the broiling stage and its stated finish check.
Prepare for the next step
Have the next addition ready when the mixture reaches the boil described.
Prepare the finishing addition
Have the final topping or garnish ready for its specified step.
A few questions you might have
What should I prepare first?
Set out the oven, baking dish, pot, and skillet. Start with this step: Preheat oven to 350 degrees.
Which preparation step should I plan for?
Follow the covered and uncovered stages in their stated order.
What check should I look for as it cooks?
Bake 10 minutes longer or until cheese has melted and casserole is heated through.
Is there another preparation step to plan for?
Follow the broiling stage and its stated finish check.
Additional recipe notes
POSSIBLE VARIATIONS: Use zucchini in place of yellow squash. Try a different cheese such as romano for parmesan or a sharper gruyere for cheddar. Add extra cheese. Sneak in a sliced tomato. Substitute crushed ritz crackers for panko (use 35 crackers, and no broiling necessary). Try it with creme fraiche in place of sour cream.
Storage & reheating safety
For cooked, perishable leftovers, refrigerate within 2 hours (1 hour above 90°F), using shallow containers for prompt cooling. Keep the refrigerator at 40°F or below, use refrigerated leftovers within 3–4 days, and reheat hot leftovers to 165°F, checked with a food thermometer. Follow any shorter package limit.
These are general safety limits, not a tested storage or freezing recommendation for this particular dish. USDA leftovers guidance · Safe cooking temperatures
Recipe source: cookingclassy.com. Ingredient names and quantities may be adapted for the pantry.
Preparation notes follow the recipe shown here.