Creme Egg Brownies

Ingredients

• 1¼ cups all-purpose flour
• 1 teaspoon salt
• 2 tablespoons dark unsweetened cocoa powder
• 11 ounces dark chocolate (coarsely chopped)
• 1 cup unsalted butter, cut into 1-inch pieces
• 1 teaspoon instant espresso powder
• 1½ cups granulated sugar
• ½ cup packed light brown sugar
• 5 eggs (at room temperature)
• 2 teaspoons vanilla extract
• 1/2 cup light corn syrup
• 4 tablespoons unsalted butter, (room temperature)
• 1 teaspoon vanilla extract
• 1/4 teaspoon salt
• 3 cups powdered sugar
• milk, (as needed (1-2 tablespoons))
• yellow food coloring
• 6 ounces milk chocolate, (chopped)
• 4 tablespoons unsalted butter, (cut into cubes)