Natural blue food coloring is easy to make at home. You only need 2 ingredients: red cabbage and baking soda! So bring some color into your life and naturally dye your food blue – no one will believe that you used red cabbage to achieve the incredible blue color!
I wanted to make natural blue food coloring made with red cabbage for a long time and now I finally made it! Yay, I’m so excited! I put together a tutorial so that you can make natural blue food coloring too. You can use natural blue food coloring to color ice cream, cake, frosting & icing, drinks, pasta, fried eggs… (recipes below)
If you’re wondering if food colored with red cabbage food coloring doesn’t taste of red cabbage. 😉 No, if you don’t use to much natural blue food coloring to dye the food. Neither the blue ice cream nor the blue cookies nor the blue milk tasted of red cabbage.
Homemade Natural Blue Food Coloring With Red Cabbage
- 1 head of red cabbage
- about 1/4 tsp baking soda
Cooking The Cabbage
Slice the red cabbage into strips. Put the sliced cabbage into a large pot, half cover it with water and bring to a boil. Reduce the heat and continue to simmer the cabbage for about 15 minutes.
Strain out the red cabbage. Use the red cabbage for another recipe.
Simmer the purple water for another 15 – 30 minutes until the consistency of the natural blue food coloring is thick and syrupy.
Adding Baking Soda
Add baking soda a little at a time to turn the purple liquid into blue. It will foam up when you add the baking soda.
Don’t add more than 1/4 tsp baking soda or the natural blue food coloring will taste salty and not very pleasant!
Testing The Color
Because homemade natural blue food coloring is so dark, use some milk, soy milk or yogurt to test the color.
How To Store Natural Blue Food Coloring
It’s best to use the food coloring when it’s fresh or freeze it. Homemade natural blue food coloring doesn’t keep very long in the fridge: The cabbage taste becomes more pronounced after some days!
How To Use Natural Blue Food Coloring
Now have fun with your homemade natural blue food coloring! I made blue icing with powdered sugar, water and blue food coloring. If you add more blue food coloring, the icing is dark blue like the cookie on the right, if you add less blue food coloring it’s turquoise like the cookie on the left.
Red Cabbage Taste
It’s best not to use too much red cabbage dye or the food (especially drinks and ice creams) might taste of red cabbage. If a food you dyed tastes of red cabbage, you can mask the taste with essential peppermint oil, homemade vanilla extract or rum. But it’s safe to dye icing, sugar & fried eggs dark blue (recipes below) – I’ve often made it and they’ve never tasted of red cabbage.
If you need a dark blue natural food coloring and are worried about the red cabbage taste, you can use butterfly pea tea instead.
Natural blue food coloring is ph-sensitive: If you color an alkaline food, it’ll be blue. If you add it to an acidic food (e.g. lemon juice), the blue food coloring will change back to purple or even pink. You can use the ph-sensitivity to make your own ph indicator! I used the natural blue food coloring to test the ph level of the ingredients for my natural blue cake experiment.
Recipes With Natural Blue Food Coloring
Candy & Desserts
More Homemade Natural Food Dyes
More Uses For Red Cabbage
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