First make your sweet potato puree. Cover your potatoes with aluminum foil and place into a preheated oven at 210 degrees. Cook your potato for approximately 30-40 minutes or until you can prick your potato and it is soft on the inside.
Take out sweet potato, let cool for 10 minutes and then take off the skins to have your cooked potato.
To your blender (or just mix in a bowl, but blended makes them lovely and smooth), add sweet potato purée, maple syrup, almond butter, vanilla extract. Mash with your potato masher and combine.
Once blended or mixed then add cacao powder and sea salt – (quick tip, if you scoop out some of the batter at this point and place in the fridge, it can make for a delicious frosting!)
Now add baking powder and oat flour and stir or blend until thick.
Transfer batter to your brownie tin – I would suggest only spreading your batter approximately 1 inch thick or less, any thicker your brownies may not cook.
Bake on the middle rack at 180degrees for 30 minutes or so. Turn off your oven and let sit in the oven for another 10 minutes. Remove from the oven and let cool in the pan for 30 minutes to 1 hour.
Eat straight away or refrigerate and add on your sweet potato frosting on top. You can also serve with coconut cream, raspberries, melted chocolate or any other condiment you might like!