Preheat the oven to 375°F.
Prepare brownie mix according to the directions on the package.
Pour brownie mix into well greased 9 inch square baking pan.
Roughly chop up Cadbury eggs, set aside.
In small bowl combine the flour, salt, baking soda
In large mixing bowl beat the softened butter and sugars until creamy, add in the egg, beat until mixed
Slowly add in the flour mixture. Stir until combined fold in the mini chocolate chips. and chopped up Cadbury eggs.
Spoon cookie dough into the baking dish on top of the brownies. You won't be able to really spread it to even it out since the dough is thicker. Just spoon it on as evenly as you can and as it bakes it'll even out more.
Bake for 20 minutes. Allow to cool, and enjoy!!