Cream butter, granulated sugar and brown sugar. Add the eggs and vanilla and beat until creamy. Add the dry ingredients, one at a time, and blend very well. The dough will be very stiff so you may need to use your hands on the final ingredients. HINT: Add the chocolate chips and pecans last.
Roll the dough out into 1 1/2 in. balls and place on cookie sheet. Do not press flat.
Bake in a 350 degrees F (preheated) oven for 10 to 12 minutes. Cool for 2 minutes and transfer to wire rack for continued cooling. Store in an airtight container once the cookies are completely cooled.