Catsup.io is the internet's most comprehensive resource dedicated to the history, science, culture, and future of catsup — the original American spelling of the world's most popular condiment. Our editorial team digs into centuries of sauce history, from the fermented fish pastes of 17th-century Southeast Asia to the tomato-based staple found on 97% of American tables today.
We publish in-depth articles covering catsup brands like Heinz, Hunt's, and Brooks, regional taste differences across the United States, homemade recipes ranging from classic tomato catsup to creative variations like blueberry and walnut, and the fascinating science behind what makes this simple condiment so universally loved. Whether you are curious about the catsup versus ketchup spelling debate, want to learn about organic and sugar-free options, or need tips on proper storage and shelf life, you will find well-researched answers here.
Our goal is simple: to be the definitive guide to everything catsup. We believe this humble condiment tells a bigger story about food, culture, immigration, and American identity. Explore our articles, try our recipes, and join a growing community of sauce enthusiasts who know that catsup is more than just a topping — it is a tradition.