If you prefer it thicker, I would recommend using a thicker store-bought vegan mayo like Vegenaise. I used homemade mayo which has a little thinner consistency.
If you have the time, allow the flavors to meld together by refrigerating the vegan honey mustard for 30 minutes before serving.
Important Note about Salt: Not all salts are made equal and cannot be substituted 1:1. If you are substituting table salt for kosher salt, you will need to cut the amount called for in the recipe by at least half.