1. Mix cream cheese, sour cream, taco seasoning, shredded Mexican cheese, and sliced green onion together in a large bowl until combined and smooth.
2. Roll the mixture into a ball and chill until firm.
3. Crush some Doritos (nacho cheese or cool ranch flavor) and roll the cheeseball into them until completely covered.
4. Chill again until ready to serve with crackers and tortilla chips.
5. Optional garnish: shredded lettuce and tomatoes.
