Add the habaneros, garlic, onion and chicken bullion cube to a saucepan and just cover with water. Bring to a boil and cook 15 minutes, uncovered, until most of the liquid is evaporated. Let cool.
In a blender or use an immersion blender, add cooked habanero mixture and remaining ingredients. Blitz until creamy and smooth.
Chill for 30 minutes and creamy habanero sauce firms and thickens slightly. Season to taste with salt and pepper to taste. If not as thick as you'd prefer, add more sour cream, 1/4 cup at a time.
Serve with tortilla chips or use as a sauce for tacos and more.
Notes
This makes about 1 1/2 cups, nutritional information based on 2 tablespoon serving. I have 4 habaneros in my photos as I like it HOT, beware if you choose!