Ingredient:

• COOKIE LAYER:
• 2 cups all-purpose flour
• 1 teaspoon baking soda
• 1 teaspoon salt
• 1/2 cup unsalted butter, softened (8 tablespoons)
• 1 cup packed brown sugar
• 1/3 cup sugar
• 2 teaspoons vanilla extract
• 1 large egg, room temperature
• 1/2 cup semisweet chocolate chips
• BROWNIE LAYER:
• 12 ounces bittersweet chocolate, chopped
• 1 cup sugar
• 1/2 cup packed brown sugar
• 1/2 cup canola oil
• 3 large eggs, room temperature
• 2 teaspoons vanilla extract
• 1-1/2 cups all-purpose flour
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt