Carve an Cast Chocolate Treets




About: I work for a charity most of the time but when i,m not i am a wood tuner, former teacher, artist and prop maker, developer and researcher residing in the UK. I cannot think of anything better than the excite...

I think the best way to explain how this project came about is by saying a few things bumped into each other happily this happened... Firstly I have been doing a bunch of carvings recently and enjoying every second of it. Secondly a friend of mine told me about siligum and wouldn't shut up about how awesome it is for making food safe fabtastic moulds for casting assorts (she is a prop maker for TV so was actively casting puppet eyeballs with it) and i am planning to get married so I'm currently developing ideas for things like ladies favor's and wedding cakes which will blow people away with how awesome they are.

So being that I already had a few great things that I had made around to make molds of I decided to experiment.
~I bought a pretty reasonably priced pack of Silicone Moulding Paste and chocolate and set off on a bit of an experimenting adventure.

I have made moulds before but these tend to be in rubbers and algenate ect.. This was my first experience with siligum after researching it and its properties. I would defiantly recommend it as one of the easiest and quickest ways to make a mould there are.

Step 1: Grab the Thing You Want to Mould and the Siligum

I am lucky enough to have a few projects about the place at the moment.

If you would like to see how i made them follow these handy dandy links

I started with 300g of siligum and used about 2/3 of this amount making 3 castings

Step 2: Measure and Mix

The Silicone Moulding Paste I used asked for a 50/50 ratio of the blue and white.

Mix the two equal parts together until you have a solid tone with no streaks.

Step 3: Squish the Siligum Onto the Thing You Want to Make Copies of

When you have a constant consistency squish the silicone molding paste onto the surface you want to cast.
Plan ahead to avoid capturing air bubbles (if you do get air bubbles its not the end of the world but it does add another step a little down the line.)

If you only want to cast one side of the object like I have here with the talisman this is by far the easiest mould you can make and use. If like me you want to make things difficult for yourself then well done.. multi part moulds are seen as difficult. (they don't have to be really)

The moulds should set in five minutes.. (check your how to use guides)

Step 4: Re Enforce Your Moulds

OK so this is only needed for the 2 part mould makers. 1 part people you can skip a few steps.

I chose to re enforce my moulds with masking tape, (when making big moulds I tend to re enforce with plaster an more ridged forms but I thought with such small items masking tape would be sufficient.)

I taped each side leaving a line which would allow me to easily cut.

If I was to do this project I would place this seam line in a different place on the skull. (I don't think it adds anything good having a visible seam running though his face)

Step 5: Separate the Mould Halves

Make an incision into the mould stopping when you feel the solid wood and cut around the form.
Pull the two halves away from each other (you can put the carvings back where they came from now)

Step 6: If You Have Any Bubbles Fill Them

If you have any bubbles or imperfections mix some new siligum an fill the holes.

Step 7: Melt the Delicious Chocolate

There are a few good ways to melt chocolate. My preferred way involves eating it.

The best ways don,t heat the chocolate up too much and fully avoid burning the chocolate.

The method I used involves barely bringing a shallow pan of water to simmering temperature and resting a cereal or mixing bowl on the rim of this pan (at no point should the water touch the bowl). This will allow a controllable low heat to melt the chocolate.. Keep the chocolate moving and you should be rewarded with some perfectly melted chocolaty goodness. (try not to eat it all before making your chocolate castings)

There are a number of different types of chocolates which all have different properties. Here I was using a fairly cheep milk chocolate. Dark chocolate would have made my house smell amazing.

Step 8: Poor the Molten Chocolate Into the Moulds

Poor the molten chocolate into the moulds.

Carefully re-line your 2 part moulds and allow them to cure.

Here is where you can make a decisions about how you want your chocolate to act... (its characteristics as chocolate) If you put it in the fridge to cure you will end up with soft chocolate which is more likley to react with the air and "bloom", If you allow it to cool more slowly it will create a harder chocolate and will look better. I have heard that the ideal temperature for chocolate to form is the same temperature found inside of a wine fridge (around where the red wine would be kept)

Step 9: Open Up the Moulds and Enjoy

Open up the moulds and enjoy.

You might want to crank it up a notch by using food paint or decoration. These chocolaty loveys did not last long enough to be painted or decorated. Though I did have plans to use edible gold leaf on the skull.



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    13 Discussions


    3 years ago on Introduction

    Amazing idea, man, I would never though of it. One piece of advice for the novice in cooking - don't melt the chocolate in the microwave, it won't harden later. I made that mistake when I tried to make banana oreos xD They were still delicious, but I had to eat them with a spoon

    1 reply

    lol I heard that it wasn't a good idea but have never tried it. I have always tryed to barely melt the chocolate . working on the lowest temperature possible and letting it set as slowly as possible to allow the chocolate to crystallize/ set in the biggest most snappy ways possible. Knowing that microwaving has this effect makes me wonder if this can be used in any way.. I have been looking to improve my hot chocolate recipe .. At the moment it includes chocolate spread and whipped cream and results in the user having a moment where they re evaluate there life to include more hot chocolate experiences in the near future. I will have to experiment with banana orios. They sound like a winning combination.


    3 years ago

    Awesome. I recognized your carvings right away. That siligum stuff looks awesome. I'm going to have to try it out.

    2 replies

    Thank you.

    I thought it would be nice to use something which people can make for themselves as the item to be cast. And I love the idea of being able to see every part of a make, so using these carvings seemed like a great idea. Its a great feeling when people recognize your work and make nice comments.

    PS congratulations on your recent success with the animals contest. I'm sure you will have a world of fun with the action camera.


    3 years ago on Introduction

    Love it! Glad to have possibly played a small inspirational roll for the choco tiki eggs! They turned out nicely!

    1 reply

    lol I made the first tiki eggs with a much more time intensive process which involves clay and building walls out of lego to avoid spill out (if you make moulds then working with lego is a real time saver rather than creating new boxes for everything) the results from each method are pretty good but this method is a lot easier and cheaper.

    PS you defiantly played a big roll in seeding the idea of sending a carton of tiki eggs to my friend in Madeira.

    Hey thanks. I love that the instructables community is so supportive. I'm sure other people will be able to take this as a starting point and make all sorts of amazing treats useing their creations or things they know would be cool.


    3 years ago on Introduction

    That siligum looks like excellent stuff!

    It would be perfect for a handful of projects I've got brewing in the back of my mind. Thank you for sharing this!

    1 reply

    Not a problem. I'm glad its already coming in useful. I think there's a few different distributes not all of them say food safe so if you are thinking about using it for food just make sure you pick up the right one. I will probably experiment a little in the future adding pigment and the like to see if it can be used for things other than the mould. Like the casting. Certainly when I was told about it for the first time I became swamped with ideas for how it could be used.. I think the best thing to do is experiment. Best of luck with your plans.

    I would really recommend it. The silicone moulding compound is the easiest mould making system i have ever come across. Occasionally I restore old picture frames and the like and have in the past used a re usable rubber. For the amount of hassle it takes and the lack of hassle this stuff takes I am defiantly changing my go to tool to this.. Also fantastic that it fits in a kit bag and doesn't need any heat to work, an doesnt react to most stuff.. Its fantastic stuff.