In a medium bowl, whisk together the almond flour and matcha powder until evenly combined. Add the cashew butter, maple syrup, melted white chocolate, vanilla extract, and salt. Mix with a spatula until the mixture becomes a soft, cohesive dough.
Using clean hands, roll the dough into 10 smooth balls and place them on a parchment-lined tray.
Melt the white chocolate for coating in a heatproof bowl set over a pan of simmering water or in 15-second intervals in the microwave, stirring between each round. Dip each ball into the melted chocolate, letting the excess drip off, and return them to the tray.
Stir the remaining melted chocolate with the matcha powder and drizzle it decoratively over the coated balls using a spoon or piping bag.
Freeze the tray for 20 minutes, or until the chocolate coating is set. Store the matcha balls in an airtight container in the fridge for up to 1 week, or freeze for longer storage.