In the bowl of an electric mixer, cream together butter, granulated and brown sugars, vanilla and eggs. Add in salt, baking soda, baking powder and flour and mix until incorporated. Stir in chocolate chips and crushed Cadbury Mini Eggs. Dough will be slightly sticky. Scoop dough by rounded Tablespoonfuls and place on cookie sheets 2" apart. Bake for 8-9 minutes. Let cookies sit on cookie sheets for a few minutes, then carefully remove them to a cooling rack to cool completely. Store in an airtight container or bag.