For a few summers several years ago I made ketchup from half-bushel boxes of paste tomatoes, using a recipe from an old issue of Fine Cooking. The ketchup had good flavor, but it was a little too reminiscent of something Italian, with lots of bottom notes from charred onion and the faint pizza-aroma of oregano. We liked it but never used up a batch. The problem was that it substituted for industrial ketchup in only a few of its uses. It made a good topping for burgers and dipping for fries, but as a base for cocktail sauce it was terrible. Industrial ketchup essentially has no aroma; it’s pure mouth-taste — sweet, sour, salt, and umami. To emulate that blend at home would be a waste of time and money; homemade ketchup ought to have flavor. But making ketchup flavorful makes it something entirely different.
I decided to give homemade ketchup another try this summer, and this time, I went back to the nineteenth century for inspiration.