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Easy Keto Tomato Ketchup Recipe

Louise | June 7
Easy Keto Tomato Ketchup Recipe #keto

Store-bought ketchup is usually hiding a lot of sugar. This easy keto tomato ketchup recipe may be sugar-free, but it’s full of flavor.

How to Make Ketchup Keto

You would think that making ketchup is fairly straightforward – and it can be. Oftentimes, however, recipes add various types of sweeteners ranging from molasses to brown sugar to corn syrup.

Ketchup doesn’t really need to be sweet, but people’s tastes have grown accustomed to the added sugar in most processed foods. If that describes you, don’t worry. You can add erythritol to this recipe to sweeten it without kicking you right out of ketosis.

I used a base of diced tomatoes and added Italian seasoning, white vinegar, salt and pepper, and star anise.

What is Star Anise?

Admittedly star anise isn’t the most commonly used spice in America, but it’s frequently called for in Chinese, Indian, Malaysian, and Indonesian dishes.

Its licorice-like taste is similar to anise and pairs well with tomato. You’ll know it if you see it, as it has a distinct star shape. Sometimes you can purchase the whole star, or you can buy it ground into a powder.

If for some reason you cannot find star anise, or don’t have it on hand, you could substitute fennel seed, common anise, or Chinese five spice.

Star anise is said to be a good source of antioxidants, with antifungal and antibacterial benefits.

Keto Hamburger Recipes

If you’re going to make your own ketchup, you’d better have a good keto burger recipe ready to serve with it. Here are a few of my favorites.

Easy Keto Tomato Ketchup Recipe #keto

Easy Keto Tomato Ketchup Recipe #keto

Easy Keto Tomato Ketchup Recipe

  • Author: Louise Hendon
  • Prep Time: 5 minutes
  • Cook Time: 60 minutes
  • Total Time: 1 hour 5 minutes
  • Yield: 12 servings (2 Tablespoons per serving) 1x
  • Category: Condiment
  • Cuisine: Chinese



  1. Pour the can of diced tomatoes into a small saucepan.
  2. Fill the can with water and empty the water into the saucepan as well. Add the herbs and star anise and keep the saucepan on a low simmer over very low heat for 1 hour.
  3. Stir often to make sure it doesn’t burn on the bottom of the pan.
  4. Remove from the heat and stir in the vinegar. Adjust the seasoning with salt and pepper, if needed.
  5. Remove the star anise.
  6. Allow to cool, then blend into a smooth sauce in a food processor or blender. Store in a sealed container in the fridge for no longer than 4 days.


All nutritional data are estimated and based on per serving amounts.

Net Carbs: 1 g


  • Calories: 9
  • Sugar: 1 g
  • Fat: 0 g
  • Carbohydrates: 2 g
  • Fiber: 1 g
  • Protein: 0 g

Louise co-founded Louise's Foods, Paleo Living Magazine, Nourishing Brands, & CoBionic. She has considerable research experience but enjoys creating products and articles that help move people just a little bit closer toward a healthy life they love.