材料:6 tablespoons 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 teaspoon baking soda
1/4 teaspoon salt
1 cup sugar
2 large eggs
1 cup shelled pistachio nuts
1/2 cup chocolate chips
预热烤箱350F