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A baked zucchini casserole square on a white plate with a crispy golden stuffing crust and creamy vegetable filling

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Browned Butter Zucchini Casserole with Stuffing

Recipe by Ailene

This creamy, nostalgic vegetable bake gets a massive flavor upgrade from a simple trick: tossing the classic boxed stuffing mix with nutty browned butter. Sautéing the fresh vegetables instead of boiling them keeps the rich, savory filling perfectly thick—never watery—underneath a deeply toasted, golden crust.


  • Total Time55 minutes
  • Yield1 9x13-inch casserole (serves 12) 1x

Ingredients

Scale

Crispy Stuffing Crust

  • 1/2 cup (1 stick / 113g) unsalted butter
  • 1 (6-ounce / 170g) box savory herb or chicken-flavored stuffing mix (such as Stove Top), divided

Creamy Zucchini Filling

  • 1 tablespoon olive oil
  • 2 pounds (about 900g) medium zucchini, sliced into 1/4-inch rounds (about 6 cups)
  • 1 medium yellow onion, diced
  • 2 medium carrots, grated on the large holes of a box grater
  • 1 (10.5-ounce / 298g) can condensed cream of chicken soup
  • 3/4 cup (180g) full-fat sour cream
  • 1/2 teaspoon freshly cracked black pepper
  • 1/4 teaspoon garlic powder


Instructions

  1. Preheat and prep: Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with nonstick spray.
  2. Brown the butter: In a medium saucepan or skillet, melt the butter over medium heat. Continue to cook, swirling the pan constantly, until the butter foams and yields a nutty aroma with golden-brown specks at the bottom (about 4 to 5 minutes). Immediately remove from heat and pour into a large bowl. Add the dry stuffing mix and toss well to coat. Set aside.
  3. Sauté the vegetables: Wipe out the skillet and place it over medium-high heat with the olive oil. Add the sliced zucchini and diced onion. Sauté for 6 to 8 minutes, stirring occasionally, until the vegetables are crisp-tender and any excess moisture has cooked off. Remove from heat.
  4. Mix the filling: In a separate large mixing bowl, whisk together the grated carrots, cream of chicken soup, sour cream, black pepper, and garlic powder until smooth. Fold in the warm, sautéed zucchini and onions until everything is evenly coated.
  5. Assemble: Scatter exactly half of the browned-butter stuffing mixture evenly across the bottom of the prepared baking dish. Spread the creamy zucchini filling evenly over the top. Finish by sprinkling the remaining stuffing mixture over the filling.
  6. Bake: Bake uncovered for 28 to 32 minutes, or until the filling is bubbling at the edges and the stuffing topping is deeply golden and crispy. Let the casserole rest for 5 minutes before serving.

Notes

  • Why it works: The original method of boiling the zucchini guarantees a watery casserole. Taking a few minutes to sauté the vegetables evaporates that excess moisture, keeping the creamy sauce thick and rich while intensifying the savory flavor.
  • Make-ahead tip: You can assemble the filling and the bottom crust up to a day in advance, storing the dish tightly covered in the refrigerator. However, keep the top layer of buttery stuffing in a separate airtight container at room temperature so it retains its crunch, adding it right before baking.

Nutrition (per serving — estimates)

Calories: 201 | Total Carbs: 17g (Fiber: 2g, Sugar: 3g) | Fat: 13g (Saturated: 7g) | Protein: 4g

Nutritional values are approximate, based on standard reference data (USDA FoodData Central). Actual values vary by brand and exact measurements. For precision, use a tracker like MyFitnessPal or Cronometer.

  • Prep Time: 15 minutes
  • Cook Time: 40 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1/12 of casserole
  • Calories: 201
  • Sugar: 3g
  • Fat: 13g
  • Saturated Fat: 7g
  • Carbohydrates: 17g
  • Fiber: 2g
  • Protein: 4g