Gather all of your ingredients. Preheat oven to (350°F) = (176°C) degrees and grease a 9-inch by 13-inch pan.
Place the broccoli in the pan, and cover it with the chicken.
Combine the chicken soup, mayonnaise, lemon juice, curry powder, and cheese in a bowl. Stir until thoroughly mixed.
Scoop the mixture over the chicken and cover with frosted flakes.
Drizzle the melted butter over the frosted flakes on top of the casserole.
Bake uncovered for 30-40 minutes or until heated through. Enjoy.