Line a baking sheet or large plate with parchment paper.
Using a fork, mash the banana in a large bowl.
Add the nondairy milk, maple syrup, and vanilla extract to the bowl and stir to combine.
Add the almond flour, oat flour, and coconut sugar to the bowl. Stir to combine. The mixture should be soft and slightly sticky.
Add the chocolate chips to the bowl and stir until just incorporated.
Roll the dough into 12 small balls (about 1 inch in diameter) and place them on the prepared baking sheet or plate. Don’t worry if the dough sticks a bit to your fingers—it will be less sticky after chilling.
Freeze the banana bread cookie dough freezer bites for 30 to 45 minutes, until they are firm but not rock solid. Alternatively, chill them in the fridge for at least 1 hour. Before serving, roll the freezer bites gently between your hands to smooth out any lumps. Serve immediately.