In a food processor or blender, add avocado, water, red wine vinegar, tarragon, and salt. Secure lid and blend until smooth.
Slowly add butter into the mixture while blending, continue to blend until completely combined.
Did you know the avocado is a fruit, not a vegetable? Learn more about the amazing avocado, including its rich history, cultural impact and tasty ways to eat this delicious superfood in guacamole as well as other dishes!