This zucchini ground beef rice casserole is a hearty, cheesy one-dish meal made with seasoned ground beef, tender zucchini, mushrooms, cooked rice, sour cream, and cheddar cheese. It is an easy way to use fresh garden vegetables and leftover rice while creating a family-friendly dinner.thefoodblog
Why You’ll Love This Recipe
- Uses everyday ingredients.
- Makes eight servings.
- Great for busy weeknights.
- A practical way to use extra zucchini.
- Works well as a make-ahead meal.
- Mild enough for children, with easy options for adding spice.
Ingredients
- 2 cups cooked white or brown rice.
- 1 pound ground beef.
- 2 medium zucchini, sliced.
- 8 ounces mushrooms, thinly sliced.
- 16 ounces sour cream.
- 2 cups shredded cheddar cheese, divided.
- 2 teaspoons chili powder.
- 1 teaspoon salt.
- Black pepper, to taste.
- Cayenne pepper or hot sauce, optional.
Instructions
Cook the beef and vegetables
Preheat the oven to 350°F.
Heat a large skillet over medium-high heat. Add the ground beef and cook, breaking it apart with a spoon, until nearly browned.
Add the sliced zucchini and mushrooms. Continue cooking until the vegetables are tender but not mushy. If the beef releases a lot of fat, drain the excess before continuing.
Prepare the casserole mixture
Add the cooked rice, sour cream, 1 cup of shredded cheddar cheese, chili powder, salt, and black pepper to a large mixing bowl.
Add the cooked beef and vegetables. Stir thoroughly until the ingredients are evenly combined.
Assemble and bake
Lightly grease a 2-quart baking dish. A 9×13-inch dish can also be used.
Spread the zucchini, beef, and rice mixture into the dish. Sprinkle the remaining cheddar cheese evenly over the top.
Bake uncovered for approximately 20–30 minutes, or until the casserole is hot throughout and the cheese has melted.
Let it rest briefly before serving.
Recipe Tips
- Use leftover cold rice for convenience and a firmer casserole texture.
- White or brown rice both work well.
- If you have less than 2 cups of rice, the recipe will still work. Add a little extra sour cream or a splash of milk if needed.
- Choose small zucchini for fewer seeds and a more tender texture.
- If using a large zucchini, remove the seeds before slicing.
- Drain regular ground beef well after browning.
- Dice the vegetables finely if you are serving children.
- Add cayenne pepper, hot sauce, or diced green chiles for extra heat.
Meat Substitutions
Ground beef can be replaced with ground turkey, chicken, pork, venison, elk, or antelope. Leaner meats may produce a slightly drier casserole, so add a little extra sour cream if needed.
Make-Ahead Instructions
Assemble the casserole, cover it, and refrigerate it for up to 1 day before baking.
When ready to cook, remove the dish from the refrigerator and bake until hot in the center and bubbling around the edges. The chilled casserole may need additional baking time.
Serving Suggestions
Serve this casserole with:
- Cheesy Italian breadsticks.
- Tomato, cucumber, and onion salad.
- Steamed green beans.
- A crisp garden salad.
- Roasted vegetables.
- Pickled jalapeños or hot sauce.
Storage and Reheating
Store leftovers in an airtight container in the refrigerator for up to 3–4 days.
Reheat individual portions in the microwave, or warm the casserole in a covered oven-safe dish until heated through.
Frequently Asked Questions
Can I use brown rice?
Yes. Cooked brown rice is an excellent substitute for white rice and adds a slightly nuttier flavor.
Can I leave out the mushrooms?
Yes. You can omit the mushrooms or replace them with bell peppers, onions, spinach, or extra zucchini.
Can I make this without rice?
Yes, but rice provides bulk and helps create the casserole’s texture. If you omit it, consider adding extra zucchini, cauliflower rice, or cooked quinoa.
Can I use a different cheese?
Yes. Monterey Jack, Colby Jack, Pepper Jack, mozzarella, or a Mexican cheese blend can replace cheddar.
Nutrition Information
Approximate nutrition per serving:
- Calories: 435 kcal.
- Carbohydrates: 16 g.
- Protein: 21 g.
- Fat: 32 g.
- Saturated fat: 17 g.
- Trans fat: 1 g.
- Cholesterol: 99 mg.
- Sodium: 563 mg.
- Potassium: 502 mg.
- Fiber: 1 g.
- Sugar: 4 g.
- Vitamin A: 883 IU.
- Vitamin C: 10 mg.
- Calcium: 291 mg.
- Iron: 2 mg.
Nutritional information is an estimate and may vary depending on the fat content of the beef, type of rice, sour cream, cheese, and serving size.
