For the premix- in a blender add cocoa powder, sugar, cinnamon powder,cornflour and dark chocolate chips. Blend everything together till you get a homogeneous powder. Set this aside.
For the chocolate shell, chop the dark chocolate and melt it in the microwave at 30-second intervals and stirring in between. Once melted, pour the chocolate into a silicone mouled filling all the cavities. Turn the mould upside down to let the excess chocolate drip out, leaving a thin coating in each cavity. Wipe off any excess chocolate from the edges and refrigerate the mould for about 5 minutes to set.
Once set, carefully take out the shell make sure you don’t brake it. Fill one chocolate shell with premix and marshmallows. Take another shell, gently melt its edges by pressing it against a warm surface, and then carefully seal it with the filled shell to form a complete sphere.
Take melted milk chocolate in a piping bag and drizzle it on the hot chocolate bomb.
To make hot chocolate, pour 1 cup of hot milk into a mug and drop the hot chocolate bomb into it. Stir until fully dissolved and enjoy!
Recipe by Bake with Shivesh at https://bakewithshivesh.com/hot-chocolate-bombs/