Preheat oven to 350 F. In a large bowl, combine melted butter, eggs, melted chocolate chips and vanilla extract until smooth.
Whisk in flour, sugar, cocoa powder, salt and baking powder. Fold in chocolate chips.
Spread the brownie mixture out into a large greased baking dish. Bake for 30-35 minutes. Let cool completely. Melt chocolate until fully melted and smooth.
Pour the melted chocolate evenly over the brownies. Sprinkle with the crushed peppermint candy. Let set until the chocolate has fully set.
