I made my own from scratch ketchup and mayo and thousand island today but I'm not going to commit to sharing my recipe until I remake it with different oil. I used 1/2 olive 1/2 veg oil for the mayo and it frankly was soo mid it was borderline bad. I think I'm gonna go avocado oil next time and also use a blender or hand mixer instead of my immersion blender mostly bc my immersion blender sucks ass and gets super hot while it runs. also I think more pickles less pickle juice in my thousand island, and I want to add red pepper to it. it was too watery and single note in its flavor.
the ketchup kinda slaps tho so that's a winner. honey, tomato paste, water, white vinegar, white wine vinegar, garlic powder, salt, pepper, and worscheshtishire sauce. I almost want to put paprika in this too but I restrained myself.