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    Home » Blog » Sauces, Marinades, and Butters

    Ketchup with Onions

    Published: Jun 1, 2022 · Modified: Jun 1, 2022 by Karin and Ken · This post may contain affiliate links. 6 Comments

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    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.

    Overhead shot of spoonful of ketchup with onions

    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.

    Onion Ketchup

    This was inspired by my easy red chicken recipe, and pairs well with this air fryer chicken fries or grilled cheese and tomato.

    Ingredients

    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
    • butter
    • brown sugar
    • white vinegar
    • ketchup

    See the recipe card below for exact quantities.

    Instructions

    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.

    Closeup overhead shot of ketchup and onions

    Substitutions

    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.

    Variations

    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.

    Equipment

    It only takes a few pieces of basic kitchen equipment to make this recipe.

    • Skillet
    • Knife
    • Cutting Board
    • Measuring Spoons
    • Measuring Cups
    • Wooden Spoon
    • Resealable container for storage

    Storage

    This ketchup with onions can be stored in an airtight container, inside your fridge, for up to three weeks.

    Tips

    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.
    Closeup overhead shot of spoonful ketchup and onions

    FAQ

    Do you have questions about ketchup with onions? Here are some of the most commonly asked questions about onion ketchup.

    How long will onion ketchup last?

    It will last for up to 3 weeks in the refrigerator or up to 3 months in the freezer.

    How do I freeze onion ketchup?

    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.

    What to Serve with Ketchup with Onions?

    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.

    • Air Fryer Bacon Wrapped Onion Rings
    • Honey Glazed Onions
    • Smoked Onions
    • Soy Glazed Mushrooms and Onions

    Onion Ketchup

    Ready to get cooking? Remember that you can print this recipe if you would like.

    Ketchup with Onion

    This ketchup with onions is zingy, sweet, and full of caramelized onions. It makes a great condiment or addition to any sauce.
    5 from 3 votes
    Print Recipe Pin Recipe
    Prep Time 5 mins
    Cook Time 25 mins
    Total Time 30 mins
    Course Sauce
    Cuisine American
    Servings 20
    Calories 24 kcal

    Equipment

    • skillet
    • Knife
    • cutting board
    • measuring spoons
    • Measuring cups
    • wooden spoon
    • Reselable container for storage

    Ingredients
      

    • 1 white onion diced
    • 6 tablespoon butter
    • 3 tablespoon brown sugar
    • 2 tablespoon white vinegar
    • 1 cup ketchup

    Instructions
     

    • Get out and measure your ingredients.
      Overhead photo of all the ingredients.
    • Heat a skillet over medium-low heat.
    • Add butter and melt it, stirring often. Add onions and sprinkle brown sugar over top.
      Onions and brown sugar added to melted butter in a skillet.
    • Saute for 15 minutes. Stir regularly.
      onion, brown sugar and butter sauté in a skillet.
    • Reduce heat to low and stir in white vinegar
      Pouring white vinegar into the skillet.
    • and ketchup.
      Ketchup added to the skillet.
    • Simmer for 10 minutes, stirring occasionally.
      Ingredients mixed and cooked inside a skillet.
    • Check for acceptable consistency. If you prefer thicker ketchup simply simmer longer.
      Closeup photo of a spoonful of the prepared sauce.
    • Remove from heat and allow to cool a bit before using.
      Overhead photo of ketchup and onions in a small white bowl on the table.
    • Serve.
      Closeup photo of ketchup and onions served in a small white bowl with a spoon.
    • Enjoy every bite!
      Closeup photo of a spoonful of ketchup and onions sauce.

    Notes

    This recipe makes 1 ½ cups of onion ketchup

    Nutrition

    Calories: 24kcalCarbohydrates: 6gProtein: 1gFat: 1gSaturated Fat: 1gPolyunsaturated Fat: 1gMonounsaturated Fat: 1gCholesterol: 1mgSodium: 114mgPotassium: 50mgFiber: 1gSugar: 5gVitamin A: 69IUVitamin C: 1mgCalcium: 10mgIron: 1mg
    Keyword onion ketchup
    Tried this recipe?Let us know how it was!
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    Reader Interactions

    Comments

    1. Tara

      June 13, 2022 at 8:10 pm

      5 stars
      I’ll never eat plain ketchup again Delicious Everyone loved it

      Reply
      • Karin and Ken

        June 14, 2022 at 7:08 am

        We don’t either. My husband prefers this ketchup with even more onions. We love it! Glad you do too. Take care and enjoy your day! Karin

    2. Nikki

      June 13, 2022 at 8:08 pm

      5 stars
      Best ketchup I’ve ever had. I love it thanks

      Reply
      • Karin and Ken

        June 13, 2022 at 10:40 pm

        We love it too! Glad we’re not alone. All the best. Karin

    3. Bill

      June 13, 2022 at 8:07 pm

      5 stars
      THIS KETCHUP IS AMAZING THX

      Reply
      • Karin and Ken

        June 14, 2022 at 7:08 am

        Happy to hear you love it! You made my day! All the best. Karin

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    Welcome!

    Ken and Karin

    We are the kitchen divas: Karin and my partner in life Ken.

    We have been attached at the heart and hip since the first day we met, and we love to create new dishes to keep things interesting. Variety is definitely the spice of life!

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