Chocolate Mint Cookies

I made this last week with Amy - she loves the dough, but wouldn't eat the cookies. I loved both :) I got the recipe from The Mrs. Field's Best Ever Cookie Book. I didn't have mint chocolate chips, just semisweet - but it was still good. I also used unsalted butter. And as you can tell by the picture I cooled them on cookie racks.

2 2/3 cups all-purpose flour
1/2 tsp. baking soda
1/4 tsp. salt
1/2 cup unsweetened cocoa powder
3/4 cup packed light brown sugar
2/3 cup granulated sugar
2 sticks (1 cup) salted butter, softened
3 large eggs
1 tsp. mint extract
10 oz mint chocolate chips (about 1 3/4)

1. Preheat oven to 300 F.
2. In a medium bowl, combine flour, soda, salt, and cocoa powder. Mix well with a wire whisk and set aside.
3. In a large bowl, blend sugars with an electric mixer at medium speed. Add butter and beat to form a grainy paste. Scrap sides of bowl, then add eggs and mint extract. Beat at medium speed until light and fluffy.
4. Add the flour mixture and chocolate chips, and blend at low speed just until combined. do not overmix.
5. Drop dough by rounded tablespoons onto ungreased cookie sheets, 1 1/2 inches apart. Bake for 19 to 21 minutes, Immediately transfer cookies with spatula to a cool, flat surface.