10min · 15 servings Ingredients • 250g (9 oz) semi-sweet chocolate • 50g (3 ½ tbsp) unsalted butter • 15g (2 tbsp) dutch process cocoa powder • 2 ½ tbsp hot water • 106g (½ cup) brown sugar • 66g (⅓ cup) granulated sugar • 2 eggs, room temp • 75g (scant ⅔ cup) all-purpose flour • 10g (1 tbsp + 1 tsp) espresso powder • ¼ tsp baking powder • ¼ tsp kosher salt • flaky sea salt, for sprinkling