01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, baking powder, and salt until well blended. Set aside.
03 - In a large bowl, beat softened butter with brown sugar and granulated sugar using an electric mixer until light and fluffy, about 2-3 minutes.
04 - Add eggs one at a time, beating thoroughly after each addition. Mix in vanilla extract until incorporated.
05 - Gradually add the dry ingredient mixture to the wet ingredients, mixing on low speed until just combined. Do not overmix.
06 - Gently fold in chopped mini eggs and chocolate chips by hand until evenly distributed throughout the dough.
07 - Drop tablespoon-sized balls of dough onto prepared baking sheets, spacing about 2 inches apart to allow for spreading.
08 - Press a few extra mini egg pieces onto the top of each dough ball for a decorative finish.
09 - Bake for 10-12 minutes until edges are lightly golden and centers appear just set.
10 - Let cookies rest on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.