For the brownies:
- 1 tablespoon hot water
- 1 1/2 tablespoons espresso powder
- 1 cup (2 sticks) unsalted butter
- 1 cup packed light brown sugar
- 1 cup granulated sugar
- 3 large eggs, ideally room temperature
- 2 teaspoons vanilla extract
- 1 teaspoon peppermint extract
- 1 cup unsweetened or Dutch process cocoa powder, spooned and leveled
- 3/4 teaspoon kosher salt
- 3/4 cup all-purpose flour, spooned and leveled
For the chocolate peppermint ganache:
- Two 4-ounce, high-quality dark chocolate bars, finely chopped
- 1 cup heavy cream
- 1 teaspoon peppermint extract
- Crushed peppermint candies, for topping, optional