Preheat your oven to 350°F. Make sure your cast iron skillet is well seasones!
Place the butter in a medium-sized saucepan and melt it on medium heat. Add the sugar and continue heating, stirring, and dissolving the sugar as much as you can into the butter for 2-3 minutes. It won't dissolve completely.
Remove from the heat. Stir in the cocoa until combined. Let cool until the pot is safe to touch.
Beat the eggs into the mixture thoroughly.
Once it's all done, stir in the flour until just mixed into the batter.
Unwrap and place the chocolate bunny in the very center of your seasoned skillet.
Pour the brownie batter around the chocolate bunny, making sure not to get it on top.
You only want to fill the batter to about halfway up the side of the chocolate bunny, so the thicker the chocolate bunny the more batter you can use!
Sprinkle the chosen Easter candy around the bunny on top of the batter.
Bake for 30-35 minutes until the brownie batter is cooked. I use a thermometer to ensure that the brownie is baked to at least 165°F. Underbaking it ensures a chewier brownie, but it must be 165°F for food safety.
Remove from the oven and cool. Serve slices from the skillet, then remove the remaining brownie and store it in an air-tight container at room temperature for up to 5 days. Do not refrigerate.
Notes
Nutritional information will depend on what chocolates you choose.