In the container of a blender, purée together avocado, buttermilk, yogurt, dill, parsley, tarragon, lemon zest and juice, honey, and salt until smooth and well combined, approximately 1 minute, stopping occasionally to scrape down sides of blender. Use immediately.
Recipe by TeaTime Magazine at https://teatimemagazine.com/green-goddess-chicken-salad-tea-sandwiches/