Bake sweet potatoes in the oven until super soft and squishy
Peel the sweet potatoes and add to a bowl with the remaining brownie ingredients and mix together
Add all the cookie ingredients to a food processor and blitz until it forms a cookie dough texture
Mix in optional chocolate chips
Add the brownie batter to an oven safe dish, then add the cookie dough mixture to the top
Bake in the oven for 30-40 minutes at 180 Celsius
