In a saucepan, boil the tomatillos and jalapeño (if using) for about 10 minutes until softened.
In a blender, combine the avocados, fresh cilantro, crema mexicana, minced garlic, chicken bouillon powder, salt, lime juice, and white onion.
Once the tomatillos and jalapeño are done boiling, add them to the blender along with approximately 1 cup of the boiling water to help blend.
Blend everything until the mixture is smooth and creamy. Taste and adjust the salt if needed.
Serve this rich, zesty salsa as a topping for tacos, enchiladas, or enjoy it as a delicious dip with tortilla chips!
Enjoy!