Preheat oven to 375 degrees.
Whisk together flour, cocoa powder, baking soda, and salt in a medium bowl until well blended. Set aside for later.
Stir in chocolate chunks (and nuts if you choose).
Drop dough, about a tablespoons worth, 2 inches apart onto a greased cookie sheet. Flatten slightly with back of the spoon.
Bake for exactly 10 minutes and let cool on a wire rack for 5 minutes.
- 2 cups all-purpose flour
- 1/2 cup unsweetened cocoa powder
- 1 teaspoon baking soda
- 3/4 teaspoon salt
- 1 cup (2 sticks) butter, softened
- 1 cup packed brown sugar
- 1/2 cup granulated sugar
- 2 eggs
- 2 teaspoons vanilla
- 1 package (12 ounces) semisweet chocolate chunks
- Nuts are optional