Soak cashews in hot water for 30 minutes before blending.
Add cashews, vanilla extract, dates, maple syrup, and cinnamon to the blender container.
Blend on high speed for 2-3 minutes, using the tamper to push ingredients from the corners into the blade. Blend until a thick nut butter forms.
Add almonds and oats to the mixture. Pulse on variable speed 4 until combined (5-10 pulses with tamper).
Transfer mixture to a bowl and hand mix in the dried blueberries with a spoon.
Form 1-inch balls by packing the mixture with your hands.
Refrigerate for 30 minutes before serving.