Chocolate Fudge Pop Tart Bars

Bahan-bahan (16 porsi)

• 1/4 cup unsweetened cocoa powder
• 2/3 cup whole milk or heavy cream
• 1 1/2 cups semi-sweet chocolate chips
• 1 tablespoon salted butter, cubed
• 2 teaspoons vanilla extract
• 2 sticks (1 cup) salted butter, at room temperature
• 1 cup granulated sugar
• 1 egg
• 1 tablespoon vanilla extract
• 2 cups all-purpose flour
• 1/2 cup unsweetened cocoa powder
• 1/2 teaspoons salt
• 2 cups powdered sugar
• 2 tablespoons unsweetened cocoa powder
• 1 tablespoon vanilla extract
• 3.2 ounces dark or milk chocolate, melted
• coarse salt or sugar, for sprinkling