Brownie Bites

Name: Brownie Bites
Prep time: 45 min
Cook time: 18 min
Total time: 1 h 3 min
Cuisine: American
Ingredients: 12 Tablespoons unsalted butter cut into Tablespoon-sized pieces; ½ cup semisweet chocolate chips ((100g)); ½ cup natural cocoa powder ((50g)); ½ teaspoon instant coffee grounds optional; 1 cup tightly packed light or dark brown sugar ((200g)); ½ cup granulated sugar ((100g)); 2 large eggs + 1 large egg yolk; 1 teaspoon vanilla extract; 1 cup + 2 Tablespoons all-purpose flour ((140g)); ½ teaspoon baking powder; ½ teaspoon salt; 1 cup semisweet chocolate chips ((170g)); ¼ cup heavy cream ((60ml)); ½ Tablespoon unsalted butter; 1 teaspoon bourbon (optional); ⅛ teaspoon salt