Whirl avocados, olive oil, vinegar, 1/2 tsp. salt, and 1/2 cup water in a blender until smooth. Stir in chives and tarragon. Cover and let sit 30 minutes at room temperature to let flavors blend.
Season sauce with salt to taste and serve with crab.
Note: Nutritional analysis is per serving.
Servings 0
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.