Place the almonds, walnuts and pepitas in a food processor and process until only small pieces remain. Add in the maca powder, chia seeds and 1/2 teaspoon sea salt and grind to a coarse consistency.
Add in the dates and continue to pulse 10 to 15 times until broken down. Add in the almond butter and pulse until a dough forms. (You should be able to pinch the dough between your fingers. If it's too crumbly, add it in a bit more almond butter.)
Place the dough in the fridge to firm up, 10 minutes. Pinch off about 1 tablespoon dough and roll into a ball. Repeat with the remaining dough. Place in the fridge to firm up for another 5 to 10 minutes.
Store any leftovers in an airtight container in the fridge. They should keep for a few weeks.