Mint Brownies

Bahan-bahan (16 porsi)

• 3/4 cup unsalted butter ((12 tablespoons))
• 3 ounces unsweetened bakers chocolate ((1-ounce squares))
• 3 large eggs (at room temperature)
• 1/2 teaspoon pure vanilla extract
• 1 1/2 cups granulated sugar
• 1/2 cup whole wheat pastry flour (or additional all-purpose flour)
• 1/4 cup all-purpose flour
• 3 tablespoons unsalted butter (softened)
• 1 1/2 cups powdered sugar
• 1 1/2 tablespoons milk
• 3/4 teaspoon pure peppermint extract
• 2 drops green food coloring
• 1 1/2 ounces unsweetened chocolate ((1-ounce squares))
• 1 1/2 tablespoons unsalted butter