Preheat your oven to 180 C / 350 F and line an 8" square baking tin with baking paper.
In a large bowl, whisk together eggs and sugar until light and smooth, and mix in butter until combined.
3 large eggs, 250 g granulated sugar
Mix in flour, cocoa powder, baking powder and salt until combined.
½ teaspoon salt, 115 g all-purpose flour, 70 g cocoa powder, ½ teaspoon baking powder
Fold in the chopped chocolate and cherries (save some to scatter on top), and transfer the batter into the prepared baking pan. Scatter the remaining cherries on top.
200 g milk chocolate, 200 g fresh cherries
Bake in the oven for 39-40 minutes. Allow the brownies to cool, cut them into squares and serve.
Notes
Always allow the brownie to cool before slicing and serving. Before slicing, run your knife through hot water to make clean cuts.