Chocolate Pistachio Cookies

Serves: 4

Ingredients
6 Tbsps unsalted butter, room temperature, plus more for baking sheet 
2 cups all-purpose flour, plus more for baking sheet 
1/2 cup unsweetened cocoa powder 
1 tsp baking soda 
1/4 tsp salt 
1 cup sugar 
2 large eggs 
1 cup shelled pistachio nuts 
1/2 cup chocolate chips

Method
Preheat oven to 350F. Butter and flour a baking sheet; set aside. 
In a medium bowl, whisk together flour, cocoa powder, baking soda, and
salt. 
In the bowl of an electric mixer fitted with the whisk attachment, cream
butter and sugar until light and fluffy. 
Add eggs; beat until well combined, scraping down sides of bowl if
necessary. 
Add flour mixture, and stir to form a stiff dough. Stir in pistachios and
chocolate chips. 
Transfer dough to prepared baking sheet; form into a slightly flattened
log, about 12 by 4 inches. 
Bake until slightly firm, about 25 minutes. 
Cool on a wire rack for about 5 minutes. Reduce oven temperature to 300F.

On a cutting board, using a sharp serrated knife, cut cookies diagonally
into 1-inch-thick slices. Arrange cookies, cut sides down, on baking sheet,
and bake until crisp but still slightly soft in the center, about 8
minutes.

http://www.therecipeworks.com/recipe/chocolate-pistachio-cookies/