Preheat oven to 375°.

In a medium size bowl mix together the flour, cocoa, baking soda and salt; set aside.

In a large bowl cream the butter and sugars together with an electric mixer. Add eggs and vanilla and mix until combined.

Add the flour mixture, in thirds, mixing between each addition. Stir in the white chocolate chips.

Drop by rounded teaspoonfuls (I used a small cookie scoop) onto ungreased cookie sheets. Bake for 9-11 minutes or until set. Let sit on cookie sheets for 2 minutes before moving to a wire rack.