Preheat the oven to 350°F, and spray a muffin pan with cooking spray. Set aside.
In a large bowl, whisk together the eggs, salt and pepper.
12 large eggs
Add in the bacon, cheese, and onions.
12 ounces bacon, 4 ounces gruyere cheese, 1 cup green onions
Divide the mixture evenly among the prepared muffin cups.
Bake for 15-20 minutes or until set. Allow the egg muffins to cool for 5-10 minutes, then run a knife around the edges of each muffin and gently remove from the pan. Enjoy!