Ingredients

1 1/2 cups unbleached all-purpose flour 

1/4 cup unsweetened Dutch-process cocoa powder 

1 teaspoon ground cinnamon 

1/2 teaspoon kosher salt 

1/4 teaspoon cayenne pepper 

1 teaspoon baking soda 

1 stick unsalted butter, room temperature 

1 cup packed dark-brown sugar 

1 large egg, room temperature 

1 teaspoon pure vanilla extract 

12 ounces semisweet chocolate (61 percent cacao), chopped (2 1/3 cups) 

1/2 cup turbinado sugar 

Preparation

Preheat oven to 325 degrees. Whisk together flour, cocoa, cinnamon, salt, cayenne, and baking soda.

In a separate bowl, beat butter with brown sugar on medium-highspeed until light and fluffy, about3 minutes. Beat in egg and vanillauntil well combined. Reduce speedto low and beat in flour mixture untiljust incorporated. Stir in chocolate.

Roll dough into 1-inch balls(each 1 heaping tablespoon).Gently roll each in turbinado sugarto coat; place 2 inches aparton parchment-lined baking sheets.Bake until surfaces crack slightly,11 to 14 minutes. Let cool 5 minuteson sheets, then transfer to awire rack and let cool completely.