Line a 9x 13 pan with parchment paper and grease the paper and the sides of the pan.

In a separate bowl whisk the flour, cocoa, baking powder, and salt together, Set aside.

Cut the butter into pieces.

Melt butter and chocolate in a wide saucepan while stirring on low heat.

Preheat the oven to 350 degrees F.

Beat the eggs and sugar with the whisk attachment of your mixer in a bowl for 3-4 minutes until creamy.

Beat in the peppermint extract.

Beat the chocolate butter immediately into the egg-sugar mixture.

Bake for 20-25 minutes.

Remove for the oven and cook completely.

Cut into triangles and decorate.