Preheat oven to 375 F. Grease 10 muffin cavities of a muffin pan or spray liberally with cooking spray.
In a large mixing bowl, whisk together eggs, eggs whites, milk, cumin, cilantro, pepper, salt and salsa.
Transfer to a 2 cup measuring cup then pour into each cavity 3/4 of the way full. Place one tablespoon of diced avocado on top of each muffin cavities.
Bake at 22-25 minutes until muffins are set. Remove from the oven and cool in the pan 5 minutes prior to removing with a mini spatula and transferring to a wire cooling rack.
Store in the refrigerator up to 7 days in an airtight container.