If you want to make certain shapes out of it, like cutting squares out of it for example just set it in the freezer for a few minutes so that it just starts solidifying but is still bendy. That way you can easily cut shapes with a knife or just use cookie cutters to get the shapes you like and then just set it back in the freezer until it gets hard.
Put the chocolate on top of baking paper.
Spread it out with a spoon or another tool.
Put it in the freezer for a few minutes, take it out and cut it into pieces and put it back in.
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