Mrs. Fields Double Rich Chocolate Cookies

This is the recipe from the official Mrs. Fields Best Cookie Book Ever and my cousin and I both showed up to the family reunion last summer with these cookies so you know--two of us can't be wrong! They are supposed to be soft so don't over bake them.

2 1/2 c Flour
1/2 tsp Soda
1/4 tsp Salt
1/2 c Unsweetened cocoa powder
1 c Dark brown sugar, packed
3/4 c Sugar
1 c Butter, softened
3 lg Eggs
2 tsp Vanilla
2 c Semi-sweet chocolate chips

Preheat oven to 300*F.

In a medium bowl combine flour, soda, salt and cocoa powder. Mix well and set aside.

In large bowl blend sugars with an electric mixer at medium speed. Add butter and beat to form a grainy paste. Scrape down sides of bowl, then add eggs and vanilla. Beat at medium speed until light and fluffy.

Add the flour mixture and chocolate chips, and blend at low speed just until combined. Do not overmix.

Drop dough by rounded tablespoons onto ungreased baking sheets 1 1/2 inches apart. Bake for 18-22 minutes. Immediately transfer cookies to a cool surface.