Add the almond butter, chocolate protein powder, peppermint extract, and non-dairy milk to a bowl and mix until fully combined. Continue adding one tablespoon of non-dairy milk if the mixture seems too dry to roll into balls.
Scoop the truffles with a medium-sized cookie scoop into about 2 tablespoon-sized portions and roll into balls between the palms of your hands. Transfer the balls to the freezer for a few minutes while you prepare the topping.
Melt together the chocolate chips and coconut oil in either the microwave or over a double boiler until completely smooth.
Dip each protein truffle into the melted chocolate, then carefully transfer to a parchment-lined plate. Sprinkle the truffles with crushed candy canes, then transfer to the fridge until the chocolate has hardened.