The Best Way To Make Homemade Ketchup BySamantha Bansil, 08/24/2018 Gourmandize shares Share on Facebook Share on Twitter Pin it Share on WhatsApp Share on Google+ 4/5 Previous Next © Thinkstock To Store You're almost done! All you have left to do is pour your homemade ketchup into an airtight jar, allowing it to chill a couple hours before serving. As long as it's refrigerated, ketchup can last for about three weeks. More steaming articles Food HACK: Easy Homemade Ice Cream... Top 10 Tips for Great Food Photos How to Use a BBQ Chef Tips and Tricks FAST-FOOD STYLE MAYONNAISE How to make fast-food style mayonnaise in a pinch!