This Squash Casserole Recipe is a classic Southern side dish made with tender yellow squash, sweet onion, creamy cheddar cheese, and a buttery cracker topping.
It’s simple, comforting, and wonderfully golden on top, making it a natural addition to family dinners, potlucks, and holiday tables.
The squash and onion become tender before being combined with a creamy egg and cheese mixture. A layer of crushed buttery crackers finishes the casserole, creating a golden, crisp topping over the soft center.
Why You’ll Love This Squash Casserole
- Simple ingredients: Yellow squash, onion, cheddar, milk, eggs, and crackers create the foundation of this comforting side dish.
- Easy preparation: The squash is cooked in a skillet before everything is combined and baked.
- Creamy center: Eggs, milk, and cheddar create a tender, savory interior around the cooked squash.
- Golden topping: Crushed buttery crackers add a crisp texture that contrasts with the soft casserole underneath.
- Southern-inspired: The combination of yellow squash, cheddar, butter, and crackers gives this dish its classic Southern character.
- Useful for gatherings: The 9×13-inch casserole format makes it convenient for sharing at larger meals.
Ingredient Insights and Smart Choices
- Yellow squash: Thinly sliced squash cooks relatively quickly and blends easily into the casserole. Choose firm squash without soft spots for the best texture.
- Yellow onion: Finely chopped onion adds sweetness and savory depth. Cooking it alongside the squash allows both ingredients to soften before baking.
- Unsalted butter: Butter adds richness to the squash mixture and helps create a flavorful casserole. Dividing it between the skillet and casserole mixture gives the dish a consistent buttery flavor.
- Sharp cheddar cheese: Sharp cheddar provides a stronger cheese flavor that stands up well to the mild squash and creamy egg mixture.
- Eggs and whole milk: These ingredients create the creamy structure of the casserole while helping the ingredients hold together during baking.
Squash Casserole Recipe
This Squash Casserole Recipe is a classic Southern side dish made with tender yellow squash, sweet onion, creamy cheddar cheese, and a buttery cracker topping. It’s simple, comforting, and wonderfully golden on top perfect for family dinners, potlucks, and holiday tables.
Ingredients
Equipment
Method
- Preheat the oven to 350°F and lightly grease a 9×13-inch baking dish. Set it aside while preparing the squash mixture.
- Melt 2 tablespoons of butter in a large skillet over medium-low heat. Add the sliced squash and chopped onion and cook for 8–10 minutes, stirring occasionally, until the squash is tender. Drain any excess liquid well.
- In a large bowl, whisk the eggs until lightly beaten. Add the cheddar cheese, milk, salt, black pepper, and cayenne if using. Stir until evenly combined.
- Add the cooked squash and onions to the egg mixture and gently stir until everything is coated. Melt the remaining 2 tablespoons of butter in the skillet and stir it into the casserole mixture.
- Transfer the squash mixture to the prepared baking dish and spread it into an even layer. Sprinkle the crushed crackers evenly over the top.
- Bake uncovered for 40–45 minutes, or until the cracker topping is golden brown and the center is set without noticeably jiggling when the dish is gently moved. Add a Pinch
- Remove the casserole from the oven and let it rest for about 5 minutes. Spoon onto plates and serve warm alongside your favorite main dishes.
Nutrition Information
| Nutrient | Amount |
|---|---|
| Calories | 245 |
| Carbohydrates | 19 g |
| Protein | 9 g |
| Fat | 15 g |
| Fiber | 3 g |
| Sugar | 6 g |
| Sodium | 430 mg |
Common Mistakes to Avoid
- Not draining the squash: Yellow squash releases moisture as it cooks, so draining it well helps prevent a watery casserole.
- Overcooking the squash: Cook until tender, but avoid cooking it until completely mushy before it reaches the oven.
- Using too much liquid: Measure the milk carefully so the egg mixture has the intended consistency.
- Uneven cracker topping: Spread the crushed crackers evenly across the surface for consistent browning.
- Skipping the resting time: Letting the casserole rest for about 5 minutes helps the center settle before serving.
- Overbaking: Watch for a golden cracker topping and a center that is set rather than relying only on the clock.
Easy Variations to Try
- Milder casserole: Leave out the optional cayenne pepper for a gentler flavor.
- More cheddar flavor: Use a particularly sharp cheddar for a stronger cheese presence.
- Extra buttery topping: Add a slightly more generous layer of crushed buttery crackers for additional crunch.
- Onion-forward: Use slightly more finely chopped onion if you enjoy a stronger savory-sweet onion flavor.
- Peppery finish: Increase the black pepper slightly for more savory bite.
- Mixed squash: Combine yellow squash with another summer squash variety while keeping the same overall amount.
More Side Dishes to Try
How to Store Squash Casserole
- Cool before refrigerating: Allow the casserole to cool enough for safe storage before covering and refrigerating it.
- Use an airtight container: Store leftovers in a covered container or cover the baking dish securely to protect the casserole.
- Refrigerate leftovers: Keep leftover squash casserole refrigerated rather than leaving it at room temperature for an extended period.
- Protect the topping: Store the casserole covered to help prevent the cracker topping from absorbing excess moisture.
- Reheat portions gently: Warm individual portions until heated through to help maintain the tender texture of the casserole.
Frequently Asked Questions
- What type of squash is best for squash casserole?
Yellow summer squash works especially well because it becomes tender quickly and has a mild flavor that pairs naturally with cheddar, onion, and butter. - Why does squash casserole become watery?
Squash naturally contains a lot of water. Draining the cooked squash and onions thoroughly before combining them with the egg mixture helps control excess moisture. - Can I leave out the cayenne pepper?
Yes. The cayenne is listed as optional, so the casserole can be made without it for a milder flavor. - Why use sharp cheddar instead of mild cheddar?
Sharp cheddar provides a more pronounced cheese flavor, which helps balance the mild taste of the squash. - Why does the casserole need to rest after baking?
The short resting period gives the center time to settle, making the casserole easier to spoon and serve. - How do I know when squash casserole is done?
The cracker topping should be golden brown, while the center should be set without noticeably jiggling when the dish is gently moved.
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