Flourless Cosmic Brownies are a twist on the traditional cosmic brownies using my ultra fudgy flourless brownies recipe as the base with a buttercream top and covered in M&Ms.
Preheat the oven to 180°C (350°F) and line a 9"x9" baking pan with baking paper.
Melt the butter, milk chocolate and dark chocolate together.
Place the eggs, vanilla extract, brown sugar and sugar in a bowl and beat together.
Pour in the chocolate mixture into the egg mixture and mix together.
Add in the cornflour and cocoa and mix until all combined. Add in the chocolate chips and mix.
Pour into the prepared pan and place in the oven for around 30 minutes while you make the chocolate buttercream.
The top and sides will be set and the middle will be slightly wobbly.
Chocolate Buttercream;
Add the softened butter, cocoa, icing sugar and water into a bowl and beat together. If the mixture is too stiff add extra water one teaspoon at a time until it is spreadable.
Once the brownies have cooled completely - I like to place mine in the fridge to set - spread over the buttercream in an even layer and sprinkle over the M&Ms.