01 -
Preheat the oven to 325°F (165°C). Grease an 8x8-inch pan with butter and line with parchment paper. Roughly chop the entire bag of mini eggs. For ease, smash the eggs using the flat side of a knife, similar to crushing a clove of garlic.
02 -
In a medium bowl, whisk together 2 eggs, 1 egg yolk, granulated sugar, and brown sugar until combined. In a microwave-safe bowl, melt butter and semi-sweet chocolate chips in 30-second increments, stirring in between. Pour the melted chocolate-butter mixture into the egg and sugar mixture and whisk until smooth. Stir in vanilla extract.
03 -
In a large bowl, whisk together flour, cocoa powder, and salt until fully combined.
04 -
Gradually add the dry ingredients to the wet ingredients, whisking until fully incorporated. Use a rubber spatula to fold in any remaining dry bits and mix in 3/4 cup of the smashed Cadbury mini eggs.
05 -
Pour the batter into the prepared pan and spread it evenly. Sprinkle the remaining Cadbury mini eggs, along with any broken shell pieces, over the top. Bake for 30 minutes or until the brownies are set and a toothpick inserted in the center comes out with a few moist crumbs.