Line an 8x8 inch pan with parchment paper, leaving a slight overhang. Set aside.
Add nuts to a large food processor and pulse into small chunks. Add dates and and process until the mixture starts sticking together into a soft dough. Add protein powder, cacao powder, almond butter and maple syrup and pulse a few times until combined and sticky.
Using a rubber spatula, fold in oats, shredded coconut and chia seeds (if using) while pressing and kneading the mixture together.
Transfer mixture into the prepared pan and press down very firmly using a spatula to flatten until tight and compressed. Chill in freezer for 20 minutes or fridge for 1-2 hours, or until set. Use the parchment paper to lift bars from the pan. Cut into even bars. Store bars in the refrigerator or freezer until ready to enjoy.