Preheat the oven to 350 degrees
Line a 9x13 pan with nonstick foil.
Melt the butter in a microwave safe bowl until melted.
Stir in the brown sugar.
Cool a bit.
Whisk in the eggs and vanilla.
Fold in the flour, baking powder and salt.
Fold in cranberries and chocolate.
Spread in pan and bake 18-20 mins.
Cool.