Preheat the oven to 350 degrees F . Lightly grease a 7x11-inch baking dish.

Place bacon in a large skillet and cook over medium-high heat, turning occasionally, until evenly browned, about 10 minutes. Drain bacon slices on paper towels. Crumble and set aside.

Whisk eggs, milk, melted butter, salt, and pepper together in a bowl; pour into the prepared baking dish. Sprinkle with green onions and crumbled bacon. Cover with Cheddar cheese.

Bake in the preheated oven until a knife inserted near the center comes out clean, 25 to 30 minutes.