Preheat oven to 350 degrees. Line a baking sheet with parchment paper or baking mat; set aside.
In a bowl, whisk together the flour, baking powder, baking soda, and salt; set aside.
In a separate bowl, use a handheld mixer to mix together the butter and sugars until light and fluffy; about 2 minutes. Mix in the egg and vanilla until well combined. Add in the flour mixture and mix until just combined. Fold in the crushed Cadbury Mini Eggs and chocolate chips with a rubber spatula.
Using either a cookie scoop or spoon, scoop the batter onto the cookie sheets (you should get about 24 cookies total) leaving about 2 inches between the cookies. Bake for about 12 minutes, or until the cookies just begin to turn golden in color; be careful not to over bake. Remove from oven and let sit on cookie sheet for 5 minutes then transfer to cooling rack to cool completely.
