Microwave Squash Casserole

Prep: 10 min Cook: 8 min Cuisine: American

A creamy, cheesy squash casserole made quickly in the microwave, perfect for a comforting side dish that highlights fresh vegetables and melts with cheese flavor.

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Ingredients

  • 6 medium yellow squash, sliced
  • 1 medium onion, chopped
  • 3 Tbsp. flour
  • 2 Tbsp. butter
  • 1 to 1 1/2 cups grated cheese
  • 1 tsp. salt
  • 1/2 tsp. pepper

Instructions

  1. Microwave squash and onions covered in a 2-quart dish on high for 10 minutes.
  2. Stir in flour, butter, grated cheese, salt, and pepper.
  3. Microwave on medium for 8 minutes.
  4. Let stand for 3 minutes before serving.

Tips & Substitutions

For a creamier texture, consider adding a splash of milk or a dollop of sour cream to the mixture before microwaving. If you're out of yellow squash, zucchini can be a great substitute. You can also experiment with different types of cheese, such as cheddar or mozzarella, to suit your taste. For added flavor, try incorporating herbs like thyme or basil.

Serving Suggestions

This Microwave Squash Casserole pairs beautifully with grilled chicken or fish for a balanced meal. Consider serving it alongside a fresh salad, like a Fresh Pea Salad, for a refreshing contrast. For a vegetarian option, enjoy it with crusty bread or as a side dish with a hearty soup. Garnish with fresh herbs for added color and flavor.

Storage & Reheating

Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, place the casserole in the microwave for 1-2 minutes or until heated through. You can also reheat it in an oven at 350°F for about 10-15 minutes, which helps retain the texture of the dish.

Nutrition & Diet Analysis (per serving)

Each serving of Microwave Squash Casserole contains roughly 393 calories, with 6g protein, 26g carbohydrates, and 30g fat. It is an excellent source of vitamin C (138% of the Daily Value) and dietary fiber (21% of the Daily Value), and a good source of protein. It also contributes 6g of dietary fiber toward your daily target.

393 kcal 20% DV
Protein Fat Carbs

Macronutrients

Protein 5.9g 12% DV
Total Fat 30.4g 39% DV
Carbs 25.9g 9% DV
Fiber 6g 21% DV
Sugar 4.8g 10% DV

Electrolytes

Sodium 455.3mg 20% DV
Potassium 445mg 9% DV
Cholesterol 77.7mg 26% DV

Vitamins & Minerals

Vitamin A 34.1mcg 4% DV
Vitamin C 124.5mg 100% DV
Calcium 72.7mg 6% DV
Iron 1.6mg 9% DV
Diet fit High-fiber Under 400 cal
Contains Milk Wheat/Gluten

Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.

* % Daily Values based on a 2,000 calorie diet (FDA 2020).

Frequently Asked Questions

Can I prepare this casserole in advance?

Yes, you can prepare the casserole ahead of time. Simply assemble the ingredients and store them in the refrigerator for up to 24 hours before microwaving. This allows the flavors to meld together, making it even more delicious when you're ready to serve.

Is it possible to make this dish dairy-free?

Certainly! You can substitute the cheese with a dairy-free cheese alternative and use plant-based butter. Additionally, using a gluten-free flour blend will ensure the recipe remains dairy-free and suitable for those with dietary restrictions.

How can I make this dish more filling?

To make the casserole more filling, consider adding cooked quinoa or rice to the mixture. This not only increases the heartiness of the dish but also adds nutritional value. You can also mix in some sautéed mushrooms or bell peppers for added texture and flavor.

Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).

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