Prepare brownies as directed on the brownie box using a muffin tin. Fill each space in the muffin tin a quarter of the way so the brownies do not look like cupcakes, but round cookies!
Remove the brownies from the muffin pan and transfer to a cooling rack.
Let the brownies cool for 5-10 minutes.
Coat the brownies in whipped topping.
Using the strawberries & blueberries, decorate each brownie bite.