Put the walnuts in your food processor and pulse until well chopped.
Add the dates and pulse again until mixed well.
Add the cacao, 2/3 cup shredded coconut, peppermint extract, and 1 Tbsp almond milk. Pulse until combined. Add 1 more tbsp of milk if needed (you should be able to roll into balls easily.) Add a little more peppermint extract if you want an extra minty flavor.