Preheat oven to 350℉ and spray a 9x13 baking dish with cooking spray. Line the bottom with a sheet of parchment paper.
In a medium bowl whisk together flour, salt, & baking soda breaking up any clumps. Set aside.
In a mixing bowl cream together melted butter and brown sugar until well combined for about two minutes.
Add in one egg at a time, ensuring egg is well incorporated before adding the next egg. Then add in vanilla extract.
Add in the flour a little at a time on low speed until combined and there are no pockets of flour left.
Add Cadbury Mini Eggs and chocolate chips. Stir to combine.
Transfer batter to prepared baking dish and spread out evenly. Add additional Cadbury Mini Eggs on top and press down gently.
Bake for 21-26 minutes. The edges will be lightly golden. Allow to cool in the pan for at least one hour before cutting.
Serve at room temperature.
