Place the dates in a food processor and blend until they form a sticky paste.

Add the rolled oats, almond butter, cacao powder, and chia seeds (if using). Blend until the mixture is well combined and starts to clump together.

Scoop out tablespoon-sized portions of the mixture and roll them into balls with your hands.

Place the energy balls on a baking sheet lined with baking paper and refrigerate for at least 30 minutes to firm up.

Store the energy balls in an airtight container in the fridge for up to two weeks.