Place the chips in a medium heatproof bowl. Heat the soy milk in a small saucepan. Pour the heated milk over the chips. Without stirring, cover with a plate and let stand undisturbed for about 5 minutes. Stir until smooth and creamy. Add marshmallows and stir to combine. Pour molten chocolate into a shallow baking dish so that the chocolate ganache is about 1-inch thick. Place in the refrigerator until set, about 1 hour.
Once the ganache is chilled, using an ice cream scoop or a spoon, scoop the ganache into the cocoa, sugar, or sprinkles. Roll to coat.
When ready to serve, place the Chocolate Cocoa Bomb in a cup. Heat about 1 cup of soy milk in small saucepan. Pour the heated milk over the Chocolate Cocoa Bomb. Stir to combine. Serve immediately.