Making Honeycomb – Exploring Bi-Carbonate Soda

BY ON Apr 17, 2012



After making our Homemade Volcano and watching the excitement on my kids’ faces as the vinegar and bicarbonate soda reacted together, I thought I would extend the fun, fizzing and frothing into the kitchen by making some simple homemade honeycomb.


What you will need?


You will need a large saucepan and baking tray.

The ingredients are:

1 Cup White Sugar

¼ Cup Golden Syrup

3 Tablespoons Water

2 Teaspoons Bicarbonate Soda

Let’s Play 


Combine the sugar, golden syrup and water into the saucepan and place onto the stove to heat and dissolve the mixture. Bring the mixture to boil and then simmer for 5 minutes.

Let’s Discover 


The fun and exciting part:  Remove from the heat and add the bicarbonate soda and mix it through carefully.  Be careful the mixture is very hot!  The mixture will increase in size, do not over mix.

Let’s Learn 


Pour the mixture into the tin to cool and refrigerate.

To take a closer look at the Honeycomb there are numerous bubbles, some really small and others much bigger.  Some of the bubbles can be seen in the photos that have popped.  They are also noticeable when you cut the honeycomb up into pieces for eating.


The bicarbonate soda and vinegar reaction explained

The acid in the vinegar (golden syrup) reacts with the sodium bicarbonate in baking soda to form an unstable carbonic acid which breaks down and creates carbon dioxide.  The bubbles that you see from the reaction are the carbon dioxide escaping the solution that is left.  Carbon dioxide is heavier than air so it overflows the container and makes the solution appear to be doubling in size.


Download and print a copy of the recipe here: Printable Honeycomb Recipe

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7 Responses to “Making Honeycomb – Exploring Bi-Carbonate Soda”

  1. This looks so easy and thanks for providing a printable recipe. I have just printed it.

  2. Mrs Lesley Townsend says:

    Thank you for posting the Volcano recipe and the Honeycomb, I am about to try both of them with my grandson Brayden.
    It looks like fun.
    We live in North Queensland, Australia

  3. molly says:

    I am 10 and am about to try the volcano project for a school science project
    after reading about the honeycomb experiment I am intreaged to try that aswell and am trying to talk my nana and mum into doing it with me
    LRTB ( love reading this blog )

  4. Barbara says:

    AMAZING blog!! Love it! Thank you so much, and for the easy printables ready to go! :0)

  5. Jude says:

    Thanks for this I am going to make a sand volcano with my three young grandchildren today in the Isle of Man 😊

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