Step 1 In the bowl of a blender, combine the lime juice, vinegar, garlic, cilantro, green onion, salt, cayenne pepper and avocado and blend. With the blender running, slowly add the oils to form a thick, creamy dressing. Taste and adjust the flavorings, and seasoning if desired. This makes a scant 2 cups avocado dressing, which will keep, covered and refrigerated, up to 3 days.