Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius) and line baking sheets with parchment paper.

In a large bowl, cream together softened butter, brown sugar, and granulated sugar until light and fluffy.

Beat in the egg and vanilla extract until well combined.

In a separate bowl, whisk together flour, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fold in the crushed Cadbury Mini Eggs and chocolate chips using a spatula.

Scoop rounded tablespoons of dough onto prepared baking sheets, spaced 2 inches apart.

Bake for 10 minutes or until edges are lightly golden.

Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack.