Ingredients:

• 1/3 cup caramel sauce, plus more for drizzling
• 1 1/4 cup (168g) all-purpose flour
• 1/4 cup (24g) Dutch processed cocoa powder
• 3/4 cup (168g) unsalted butter
• 3 ounces unsweetened chocolate, chopped
• 1 1/4 cups (260g) granulated sugar
• 1/4 cup (46g) brown sugar
• 1 teaspoon kosher salt
• 2 teaspoons vanilla extract
• 3 large eggs
• 1/2 to 3/4 teaspoon flake salt, for topping (optional)