Once the cake is cooled, use your hands or two forks and to crumble the cake into fine crumbs.
Add mini chocolate chips and mix them into cake crumbs.
Add buttercream and mix with hands or fork until the buttercream is fully incorporated. You want the mixture to be just moist enough to roll into balls.
Tightly pack cake mixture into cake pop molds. Place popsicle stick into the bottom and remove the cake pop.
Repeat with remaining cake mixture.
Place pops into the fridge for at least 1 hour.
Place melting chocolate in a bowl and melt according to instructions on package.
Once melted, use a toothpick to add some green candy coloring until you get desired color.
Hold cake pop over the bowl and use a spoon to pour chocolate all over the pop.
Use a fresh toothpick to draw three lines pretty close together at the center of the pop.