Preheat oven to 400 F. Line a 12 count muffin pan with silicone liners or coat with non-stick cooking spray. Set aside.
In a large 4 cup measuring cup or mixing bowl, crack in eggs and whisk together with salt and black pepper.
Whisk in garlic powder and basil until combined. Stir in spinach and cheese. Divide evenly into muffin cups filling each about ⅔ full.
Sprinkle with more cheese if desired. Bake in preheated oven for 12-15 minutes, or until set.
