Melt the chocolate plus the cocoa butter in a bain-marie (in a small pot over a larger pot with boiling water).
When it all melts add in all other ingredients except the rice puffs and mix well. Add the rice puffs, mix until they are all coted in the chocolate batter, and pour into a pan lined with a baking sheet.
Place in the freezer for about an hour to set, then cut to desired sized pieces and serve.
Recipe by Vegan High Tech Mom at https://www.veganhightechmom.com/%d7%97%d7%98%d7%99%d7%a4%d7%99-%d7%a9%d7%95%d7%a7%d7%95%d7%9c%d7%93-%d7%a0%d7%95%d7%98%d7%9c%d7%94-%d7%95%d7%a4%d7%a6%d7%a4%d7%95%d7%a6%d7%99-%d7%90%d7%95%d7%a8%d7%96/