I've made ketchup. The first time I made it with our home grown beefsteak tomatoes. I don't remember exactly but got a good yield., like 4 or 5 pints. The next time we gleaned a neighbors field after the harvesters had gone through. I will never do that again. We ended up with little over a pint of ketchup. Those tomatoes were all water. It's good to make your own but I would advise against using store bought tomatoes.
Michelle, I found a ketchup recipe in my Harris' Farmer's Almanac Magazine from 2015. It calls for 3 cups apple cider vinegar, anything with apple cider vinegar has to be good. It's more than I want to post but if you want it, I will copy it and get it in the mail.
If anyone else wants the recipe I will copy it and mail. If I do not have your address, please e-mail it to me.
Hugs, Sara "FarmGirl Sister" #6034 Aug 2014 FGOTM Sept 2015 - Feb 2019 - Oct 2023
Lord put your arm around my shoulders & your hand over my mouth.