First, place mini chocolate eggs in a sandwich bag. Then, using a mallet or rolling pin smash the eggs until you get small pieces. Set aside the Cadbury egg pieces for later.
Preheat your oven to 350 degrees and line a cookie sheet with parchment paper.
Sift together the flour, baking soda, and salt in a large mixing bowl and set aside.
In the bowl of a stand mixer using a paddle attachment, cream butter and sugars together until light and fluffy, about 2-3 minutes.
Add the eggs and vanilla, being sure to scrape down the sides of the bowl as you mix everything together.
Add the dry ingredients into the wet ingredients and mix until just combined.
Add the chocolate chips and about 1/2 of the Cadbury egg pieces. Mix gently on low speed for about 30 seconds.
Using a large cookie scoop, place cookie dough balls onto prepared baking sheet. Keep cookies at least 3 inches apart and don't put more than 8 cookies on a tray at once to prevent cookies from spreading.
Press remaining Cadbury egg pieces into the top of the cookies. Bake in preheated oven for about 10-12 minutes or until the edges of the cookie appear to be golden brown.
Let cookies cool on baking sheet for 1-2 minutes. Then, remove to wire rack to let cookies cool completely.
