Rainbow Jelly Marshmallows




Introduction: Rainbow Jelly Marshmallows

About: I am an artist, builder and teacher living in Japan.

Rainbow jelly marshmallows! Sounds crazy, right? These are actually a different take on warabimochi.

Warabimochi is a jelly-like sweet made from bracken starch and covered in kinako (toasted soybean flour). I live in Japan and this sweet is popular during the summer. Bracken starch is a tad too expensive over here, so we substituted it for potato starch and the end result is a nice marshmallow flavor.



100g potato starch

100g sugar

500ml water

Shaved ice flavors


Small pot


1 large Ziploc bag


Large bowl of ice water

1 dish for ever color of shaved ice flavor

Step 1: Ingredients!

These are simple to make!

-100 grams potato starch

-100 grams sugar

-500ml water

-Shaved ice flavors or colored gum syrup

I found these single serving flavors at the local market. The jelly marshmallows will soak in the coloring and I'll show you what to do with the leftover syrup in my next post.

Step 2: The Jelly!

Combine the potato starch and sugar in a pot and add the water. Boil on low while mixing until it has the consistency of glue. It will seriously look and feel like you're mixing glue. You need to mix the entire time. It will feel like nothings happens for minutes and then BAM, it's mixed.

Step 3: The Ziploc!

Use a spatula to transfer the mix into a large Ziploc bag.

Snip a bottom corner of the bag. This is to squeeze out little balls of the jelly mix.

Squeeze the balls into the large bowl of ice water.

Help form the balls with your hands in the bowl of ice water.

Step 4: The Shaved Ice Flavors!

Let the jelly marshmallows soak in the flavors for an hour. You'll easily be able to see when they're finished.

If you don't have shaved ice flavors, you can use food coloring or gum syrup mixed with food coloring. The shaved ice flavors give them all a different taste.

These jelly marshmallows taste fun without the syrup, so you can skip this step and just start eating them.

Step 5: Rainbow Jelly Marshmallows!

These are unique and fun to eat! I'm not a jelly or jello fan, but I liked these a lot.

Let me know if you make these and think they taste like marshmallows too.

*What about the leftover shaved ice flavors? Go look for my "gelatin fizzy drinks!

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    2 years ago

    This looks fun and tasty! Is this something that should be eaten right away? Or can it last a few days in the fridge?

    bryans workshop
    bryans workshop

    Reply 2 years ago

    Thank you! It's best to eat them the same day. I haven't tried keeping them any longer though. Next time I make them, I keep a few in the fridge and check.


    2 years ago on Step 5

    This is fascinating, thank you for sharing this fun Instructable!

    bryans workshop
    bryans workshop

    Reply 2 years ago

    You're welcome and thanks!


    2 years ago

    Amazing. I cook, clean and more in our house; caring for disabled wife even since 2008 when I had my disabling brain-stem stroke. She and I love jelly, and marshmallows. I've never heard of these, and am glad we can manage to use potato starch. thank you very much.
    We'll have Udon, hibatchi beef/chix, and have psychedelic dessert. Sounds great. This is most wonderful.