Preheat your oven to 350°F (175°C).
Grease a muffin tin with non-stick spray or line it with muffin liners.
In a large mixing bowl, crack all 15 eggs and whisk until well combined and fluffy.
Add the drained green chiles, Mexican blend cheese, Spike seasoning, salt, and black pepper to the beaten eggs. If using green onions, fold them in. Stir gently until mixed.
Pour the egg mixture into each muffin cup, filling them about ¾ of the way full.
Bake for 20-25 minutes, or until the egg is set and tops are lightly golden.
Let the muffins cool in the tin for about 5 minutes, then transfer to a wire rack to cool completely.