Source: Ninfa's

This sauce is popular in many Mexican Restaurants in Houston. Ninfa's was one of the first restaurants to serve this sauce. It's served with salsa and chips before your meal.

3 medium avocados
3 medium green tomatoes
4 fresh tomatillos
3 cloves garlic
2 or 3 sprigs cilantro
1 or 2 jalapenos
1 1/2 cups sour cream
Salt to taste

Peel avocados and place them in a blender. In a medium saucepan, boil tomatoes, tomatillos, garlic, and jalapenos for 15 minutes.

Remove from saucepan and place all ingredients in a blender with the avocados. Add sour cream and blend until smooth.