Spinach Alfredo Casserole

⅓ cup butter

1 (3 ounce) package cream cheese, softened

⅓ cup grated Parmesan cheese

½ teaspoon garlic powder

½ teaspoon onion powder

¼ teaspoon white pepper

1 (10.75 ounce) can condensed cream of celery soup

½ cup heavy cream

3 (10 ounce) packages frozen chopped spinach, thawed and drained

1 (6 ounce) can French-fried onions

2 tablespoons dry bread crumbs

¼ cup grated Parmesan cheese

Preheat an oven to 350 degrees F (175 degrees C). Grease a 9-inch square pan.

Heat butter, cream cheese, 1/3 cup Parmesan cheese, garlic powder, onion powder, and white pepper in a large saucepan over medium heat. Continue stirring until smooth. Stir in the celery soup, cream, and spinach. Pour spinach mixture into the prepared pan. Top with the French fried onions, bread crumbs, and remaining 1/4 cup of Parmesan cheese.

Bake in the preheated oven until bubbly and heated through, about 30 minutes.