Ketchup with onions takes traditional ketchup and makes it extra zippy with onions, brown sugar, butter, and white vinegar. It’s sweet, tangy, and so delicious.
My dad loved ketchup while we were growing up and it used to drive my mother crazy because he loved putting it on everything. I remember her complaining to him that he was unable to taste the food she made.
I do understand her point but I also understand how much my dad loved ketchup.
He would have loved this onion ketchup and I wish he could have tried it. My husband, who is also a ketchup fan, can eat this ketchup with onions almost out of a bowl.
He loves this stuff that much and if you’re a ketchup lover, you will too.
It only takes a handful of ingredients to make this simple recipe. You’ll find everything you need easily at your local grocery store.
- white onion
- brown sugar
- white vinegar
See the recipe card below for exact quantities.
It only takes a few simple steps and a few minutes to make this tasty recipe.
Step 1: Heat your Skillet
Heat skillet over medium heat to medium-low heat, add butter, and melt it, stirring frequently.
Step 2: Cook the Onions
Add onions and sprinkle brown sugar over top. Saute and stir caramelized onions regularly.
Step 3: Finish the Onions
Reduce heat to low and stir in white vinegar and tomato ketchup. Simmer, stirring occasionally. Serve.
Hint: Always cook the onions on medium-low heat to ensure the onions caramelize and don’t crisp.
Don’t have the correct ingredients on hand or want to change something up? Here are some helpful tips for you to change this onion ketchup.
- White Onion – Use a yellow or purple or red onion to alter the flavor somewhat.
- White Vinegar – Use apple cider vinegar.
Want to personalize this onion ketchup recipe? Here are some of my tried and true tips for changing up this recipe.
- Spicy – Add chili pepper flakes, some diced jalapeno or your favorite hot pepper or some hot sauce or sriracha to add some heat
- Onion – Add another onion for even more onion flavor if you love onions as much as my husband
- Shallots – Add one or two with your onions to add a different level of flavor
- Ketchup– Use chili sauce instead for a different experience
- Mustard – Add a little of your favorite to elevate the onion ketchup to a new level
- Bacon – Add cooked, diced bacon with a little rendered bacon fat and you’re sure to be impressed
- Vegetables – Add diced roasted red peppers, corn, broccoli, carrots, or mashed butternut squash
- Blender – Use an immersion blender to puree the ketchup if you prefer a smoother or smooth texture
If you love recipes like this, you may also enjoy this caramelized onion dip.
It only takes a few pieces of basic kitchen equipment to make this recipe.
- Cutting Board
- Measuring Spoons
- Measuring Cups
- Wooden Spoon
- Resealable container for storage
This ketchup with onions can be stored in an airtight container, inside your fridge, for up to three weeks.
This recipe is so simple, I don’t have much in the way of tips. You only need to remember a couple of things.
- Keep the heat low. You’re caramelizing the onions, not browning them.
- The longer you simmer this ketchup (within reason) the better it will be. Keep it covered to prevent it from reducing too much.
Do you have questions about ketchup with onions? Here are some of the most commonly asked questions about onion ketchup.
It will last for up to 3 weeks in the refrigerator or up to 3 months in the freezer.
In an air-tight container for up to 3 months. If you’re only using this ketchup occasionally, freeze it in smaller containers and bring them out to defrost as needed. Simply place the container in warm water to defrost.
Topping is perfect on a burger, eggs, french fries, ice cream, hot dogs or corn dogs, grilled cheese, french toast, grilled red meat, or anything you enjoy ketchup with.
More Onion Recipes
Do you like onions? Here are some recipes you may also like to try.
Ready to get cooking? Remember that you can print this recipe if you would like.
Ketchup with Onion
- cutting board
- measuring spoons
- Measuring cups
- wooden spoon
- Reselable container for storage
- 1 white onion diced
- 6 tablespoon butter
- 3 tablespoon brown sugar
- 2 tablespoon white vinegar
- 1 cup ketchup
- Get out and measure your ingredients.
- Heat a skillet over medium-low heat.
- Add butter and melt it, stirring often. Add onions and sprinkle brown sugar over top.
- Saute for 15 minutes. Stir regularly.
- Reduce heat to low and stir in white vinegar
- and ketchup.
- Simmer for 10 minutes, stirring occasionally.
- Check for acceptable consistency. If you prefer thicker ketchup simply simmer longer.
- Remove from heat and allow to cool a bit before using.
- Enjoy every bite!