Preheat your oven to 350F. Line two baking sheets with parchment paper or silpat.
Place the chopped chocolate and the butter in a saucepan over low heat. Stir constantly to prevent burning. Heat until the chocolate is almost melted and smooth. Remove from the heat and continue to stir until completely smooth and melted. Set aside to cool slightly.
In a large bowl, beat the eggs and the granulated sugar until light and fluffy, about 5 minutes.
Add the vanilla extract, cherry juice, if using, and ⅓ of the melted chocolate. Mix in until combined. Add another ⅓ of the chocolate and mix, then add the last of the chocolate and mix in until well incorporated.
In a separate bowl, sift together the flour, cornstarch, baking powder, espresso powder, and salt. Add to the wet ingredients and mix in until no dry flour streaks remain.
Add the chocolate chips and the well-drained quartered cherries. Fold in gently.
Using a ¼ cup cookie scoop or measuring cup, scoop the batter onto the lined baking sheets, 6 to 8 per sheet, allowing room to spread.
Bake for 12 to 14 minutes or until set around the edges but still soft in the middle. Remove from the oven and allow to cool on the baking sheet for 5 minutes. Remove to a cooling rack and allow to cool completely.
Store in an airtight container at room temperature for up to 5 days.