Grease a baking pan with butter and set aside.

Preheat oven to 350 degrees F.

In a large bowl, combine the all purpose flour, salt, and cocoa powder. Set aside.

Melt butter and chocolate in a heatproof bowl over a pot of simmering water, making sure the water doesn’t touch the bowl. Stir until smooth. Add 1/2 cup m&ms.

Stir in the sugar and then remove from the heat.

Let the sugar and chocolate mixture cool down a bit.

Add the eggs one at a time and mix until well incorporated.

Stir in the vanilla extract.

Fold in the flour mixture then pour the batter into the greased baking dish.

Add the remaining m&ms on top of the brownie batter.

Bake for 45-60 mins or until done.

Let the brownies cool before eating.