Place chocolate chunks in a microwaveable bowl, cook for 20 seconds in a 1200 watt microwave then stir. Microwave for additional 20 seconds and stir again. If the chocolate is not completely melted, add cooking time by 10 seconds to melt completely.
Using a spoon, pour melted chocolate into the piping bag from step 8. Cut the tip as needed and draw leaves on the lined pan. Set aside to allow to harden.