1. Combine the oats, dates, cacao powder, and salt in the blender. Process until the everything is broken down. 2. Add the water slowly while the blender is running until the dough starts to stick together. 3. Press the dough into a lined loaf pan.
For the frosting, blend the dates, non-dairy milk, and cacao powder on high until smooth.
Frost the brownies then refrigerate for 2 hours before cutting and eating. Keep in the fridge.
A tip for frosting: Optionally you could soak the dates in the non-dairy milk first for easier blending.