Preheat the oven to 350 degrees.
Put butter in a microwave safe bowl until melted.
Add butter, brown sugar, vanilla and egg then mix well.
Mix the flour, baking powder, salt and baking soda together.
Add dry ingredients gradually.
Mix in chocolate chips and pastel m&m’s.
Blend well, and pour into greased 9x9 pan.
Sprinkle with chocolate chips and bake at 350 for 20-25 minutes.
Once out of the oven top with the chocolate chips, m&m’s and cadbury’s.
Set aside to cool.
Cut and enjoy!!!