Mississippi Mud Pie | America's Test Kitchen

Ingredients

• 16 Oreo cookies , broken into rough pieces
• 1 tablespoon sugar
• 4 tablespoons unsalted butter , melted and cooled
• 4 ounces (113 grams) bittersweet chocolate , chopped fine
• 3 tablespoons unsalted butter
• 3 tablespoons vegetable oil
• 1 1/2 tablespoons Dutch-processed cocoa powder
• 2/3 cup packed (4 2/3 ounces/132 grams) dark brown sugar
• 2 large eggs
• 2 teaspoons vanilla extract
• 1/4 teaspoon salt
• 3 tablespoons all-purpose flour
• 2 ounces (57 grams) Oreo cookies
• 2 tablespoons confectioners' sugar
• 1 tablespoon Dutch-processed cocoa powder
• 1/8 teaspoon salt
• 2 tablespoons unsalted butter , melted
• 6 ounces (170 grams) milk chocolate , chopped fine
• 1 cup heavy cream , chilled
• 2 tablespoons Dutch-processed cocoa powder