Preheat the oven to 325°F, and spray a 9x13-inch baking dish with non-stick cooking spray.
Pat the flounder dry to remove excess moisture. Then place the fillets in the pan in an even layer.
1 pound flounder fillets
In a small bowl, melt the butter and stir in the lemon pepper, garlic powder, and salt. Then, drizzle the butter sauce over the fillets.
¼ cup unsalted butter, 2 teaspoons lemon pepper seasoning, ¼ teaspoon garlic powder, ¼ teaspoon salt
Bake, uncovered, for 15-20 minutes or until the fish flakes easily with a fork. It should register 145°F on an instant read thermometer.
Serve immediately. Scroll up and see the post for storage information and answers to frequently asked questions.