Preheat the oven to 400°F (200°C). In a bowl, toss the cherries with sugar and balsamic vinegar. Spread on a baking sheet and roast for 15 minutes.

Remove from oven and let cool.

In a mixing bowl, combine melted butter and sugar. Mix well.

Add eggs one at a time, mixing well after each addition. Stir in vanilla extract.

In another bowl, mix flour, cocoa powder, and salt. Gradually add to the wet ingredients, mixing until just combined.

Fold in the roasted cherries into the brownie batter.

Pour the batter into a lined baking pan and sprinkle dark chocolate chips on top.

Bake in the preheated oven for 25 minutes or until a toothpick comes out with a few moist crumbs.

Allow the brownies to cool in the pan for at least 10 minutes before cutting into squares.

Serve warm or at room temperature.