Spray an eight-by-eight-hump baking dish with nonstick cooking spray.

In a medium saucepan, soften the butter. Add the marshmallows and mosey till they soften. Bewitch away the pan from the warmth, add the puffed rice cereal and matcha powder and mix to mix. Press the combination into the prepared dish and let stand till the treats secure space, about 10 minutes. Lower into 2-by-2-hump squares and transfer to a plate.

Living a wire rack on a baking sheet. Melt the dusky chocolate and coconut oil together in a microwave or double boiler. Dunk the underside of each square into the melted chocolate combination to coat and position on the wire rack to space.