Start by baking the sweet potatoes. Make some holes in them and place them in the oven for 30-40 minutes at 200 C / 400 F. Let them cool, remove the skin and mash them.
Next, into a blender or food processor, add the oats and blend for 1-2 minutes until flour is formed. Set the flour aside.
Into the same blender, add the plant-based milk and the dates. Blend for a few minutes until combined.
Transfer the oat flour into a medium mixing bowl, along with the cacao powder and baking powder. Mix everything until well combined.
Then, add the mashed sweet potatoes, peanut butter, coconut oil, and the date and milk mixture. Stir again.
Lastly, add half of your chopped almonds and fold in gently.
Into a baking pan, add the batter and spread evenly. Add the rest of the almonds.
Bake for about 30 minutes on 175 C/ 350 F. (P.S. if you have an aluminum pan, bake for 40 minutes instead of 30).
Let the brownie cool completely before cutting and serving. Otherwise, they are going to break apart. Store in the fridge for up to 5 days.