Chocolate Mint Brownies

Bahan-bahan (16 porsi)

• 5 ounces bitter sweet chocolate (cut into pieces)
• ½ cup butter
• 1 cup granulated sugar
• 2 eggs
• ½ teaspoon vanilla extract
• ½ cup all-purpose flour
• 2 tablespoons unsweetened cocoa powder
• ¼ teaspoon salt
• ½ cup unsalted butter (softened )
• 1 teaspoon mint extract
• 3 cups powdered sugar
• 3 tablespoons milk (or as needed)
• green food coloring
• 1 cup chocolate chips
• 2 teaspoons vegetable oil