Place the plant milk in a heat-proof measuring jug and microwave in 20 second bursts until hot and steaming but not boiling.
170 ml plant milk
Place the chocolate chips or finely chopped chocolate in a heat-proof bowl and pour the hot plant milk over the top. Cover with a lid or plate and leave for 5 minutes.
300 g dark chocolate
Remove the lid and whisk until smooth. If there are still lumps of chocolate remaining, place the bowl in the microwave and heat on medium power in bursts of 20 seconds, whisking between each go, until smooth.
Transfer the smooth chocolate mixture to a tupperware container and cover with the lid. Place in the fridge to chill for at least 1 hour (ideally overnight).
Place the cocoa powder (or chocolate sprinkles) into a shallow bowl.
5 tablespoon cocoa powder
Remove the chocolate mixture from the fridge and use a teaspoon to portion out 20g scoops of the mixture (around 1.5 tbsp). Wash your hands under cold water then dry thoroughly. Roll a scoop of mixture in your hands until you have a rough ball then drop it into the cocoa powder (or chocolate sprinkles). Carefully roll until completely covered, then remove and place on a plate. Repeat with the remaining truffles.
Place the plate of rolled truffles in the fridge to chill until you're ready to serve. If storing for more than a day, store in a sealed container to keep the truffles from drying out.