You might have seen these noodles pop up everywhere, you can find many examples on my Instagram account. These noodles will turn from blue to pink in front of your eyes, pure magic, well actually it’s chemistry but let’s call it magic!
As you might or might not know I never use artificial food colourings, so we won’t be using anything crazy for this little project/recipe, just simple, wholesome foods. All you need are these 3 simple ingredients:
- clear or white noodles
- purple cabbage
- lime or lemon juice
How to make these Noodles.
First we start out with a piece of purple cabbage, yup purple cabbage, this is gonna be the main component for making these noodles. We start by cooking it for five minutes in a pot with some water, the amount of water used and the time you soak the noodles will affects the shade of blue your noodles will be.
The next step will be to turn of the heat and add the noodles. You can use basic white or clear noodles, my preference is mung bean noodles aka glass noodles because I like the taste and the effect the glassiness of the noodles add final dish.
Now let these noodles soak for about 5 to 10 minutes, depending on how deep you want the colour to be. Remove the noodles and place them in a bowl.
These noodles where soaked in a pot half filled with water
To get a darker shade I used half the amount of water so the noodles can absorb all of the soaking water
The last step is where the magic comes in, we are gonna turn these already beautiful blue noodles into a noodle dish everyone will be mesmerised by, we are gonna turn them into unicorn noodles! Take a lime or lemon and squeeze some of the juice wherever you want it to be pink and watch the noodles change colour in front of your own eyes.
How does this works.
Lets talk about the chemistry behind this fun dish!
Purple cabbage has a pigment called anthocyanin, which is a pigment that changes colour when it makes contact with something acidic or alkaline. This makes purple cabbage an indicator to tell if something is acidic or alkaline.
When you cook a few pieces of purple cabbage for a short time in some water you’ll get a nice blue shade, cook it for bit longer with a bit more purple cabbage will give you a nice purple shade. Now when you add something acidic (lemon or lime juice) to the blue coloured noodles the pigment from the purple cabbage will react and takes on a bright pink colour.
Now if the pigments were purple and you’d like to turn them blue or green you would add something alkaline in the form of baking soda. You can see this affect in my sushi recipe which you’ll find over here
I will make a whole post dedicated to natural food colouring where we will look at all the colours of the rainbow and how we can add them to food naturally. But until then you have to make due with these unicorn noodles!
Recipe Ideas.
You can have these noodles with whatever your heart desires, this might be a delicious satay sauce with vegetables or with some curry, stir fry vegetables or maybe use it in a salad, the options are endless.
These were with falafel and kimchi
These I had with a rich miso vegetable broth.
Find the recipe for this pepper soup over here!
If you recreate this recipe don’t forget to drop a comment down below and feel free to tag and follow me on instagram and facebook.
One Love,
A.J.
Doreen Ellen Bell-Dotan
Absolutely beautiful recipes. Thank you.
indigokitchen
Thank you so much Doreen!
Much Love,
A.J.
Greenderella
I love colorful food and these noodles put it to a new level. Thank you for the awesome inspiration! 🙂
indigokitchen
Thank you so much! I’m happy you liked the post! Rainbow foods for the win right!?✨ ?✨?
Kristin
How much cabbage do you use when boiling it? This recipe sounds really fun and I’d love to try it?
indigokitchen
Hi Kristin! Oh it’s so much fun, I make it a couple of times a week. You can use as little and as much cabbage as you want. I use a different amount every time to create different shades. 1/8 of a cabbage is more than enough try more or less for bolder is more pastel colours! ❤️
Ashley
Does using the cabbage effect the taste of the noodles?
indigokitchen
Hi Ashley,
The cabbage doesn’t affect the taste, for me it always leaves me with neutral tasting noodles.
Much Love,
A.J.
lora
Bless you for sharing this incredible idea!! Never heard of it before and am really excited to try this on my granddaughters – I have five granddaughters 8 and under – youngest is 1. I can’t wait to see the look on their faces! They will not be allowed to know it was made with vegetables! What a fun idea and how awesome of you to share this!! thanks so much
indigokitchen
Aah thank you so much! I’m sure your granddaughters will love these noodles, they’re truly something magical! Much love ❤️
Huyen Ta
Hi! I LOVE your photos! Great work!
I was eating baked purple yam today when I noticed that the side contacted with my teeth turned blue. It reminded me of your magical noodle so I wonder what would happen if the yam meets something acidic. So I grabbed half a lime and squeezed the juice onto another piece of yam and guess what! The yam turned red. I think I would be a great idea if you give it a try and maybe come up with another creative and beautiful post like this!
Love
indigokitchen
Hi Huyen,
Thank you for the comment and love & what an amazing discovery! I’m going on a purple yam hunt, I’ve got to try it!
Lot’s of love,
A.J.
Adarsh R
You can also try this with Butterfly Pea Flowers as it is Dry Flowers and it can Store for an Year or two . You can make it anytime you want rather than Keeping or finding a Purple cabbage. And Butterfly Pea Flowers are multipurpose which almost neutral in Taste. and Makes a Best Cup of Tea. The same Anthocyanin is the Key for Color change as well.
indigokitchen
That’s totally true! I just find that butterfly pea flowers are quite hard to come by in my country so for me it’s more inexpensive to use purple cabbage, and in this recipe it doesn’t affect the taste 😀