Gather all ingredients. Preheat the oven to 350 degrees F Grease a 6 cup muffin tin with cooking spray.
Green onions into a large bowl.
Add eggs, bacon, milk, garlic powder, onion powder, salt, and pepper.
Optional - chopped vegtables of choice
Sprinkle Cheddar cheese into the bowl and whisk until incorporated.
Pour mixture equally into the prepared muffin cups.
Bake in the preheated oven until a toothpick inserted into the center of a muffin comes out clean, about 30 minutes. Let cool slightly before serving.
