You might think that ketchup and tomato sauce aren't the kind of ingredients you can substitute for each other. But with some creative thinking, there are ways to make some swaps in a pinch. If you ...

The simple ratio of 5 parts ketchup to one part vinegar makes a fast tamarind paste substitute that has a complex character and interesting depth of flavor. Grown in South Asia and Africa, tamarind ...

Ketchup bottles are a solved technology, right? Wrong! As it turns out, there is still great development being done in this space. Industrial imaging company Lumafield reveals to us the secrets of ...

This story appears in the February 2019 issue of National Geographic magazine. Ketchup—that cheerful red sauce sold in handy glass bottles—first came on the American market in the 19th century.

Following is a transcript of the video. Narrator: Ketchup, it's everywhere in the US. 97% of Americans have a bottle in their fridge. It's the sauce we put on our hamburgers, our hot dogs ...