Preheat oven to 375 degrees.
Cream together the butter, brown sugar, white sugar and egg until the mixture is light a fluffy. Mix in vanilla.
In a separate bowl combine the flour, baking soda and salt.
Slowly add the flour mixture into the butter mixture. Stir together until fully incorporated and dough is formed.
Stir in the white chocolate chips and pecans.
Drop the dough by the tablespoon full onto a greased baking sheet.
Bake cookies at 375 degrees for 13 minutes or until lightly browned.
Remove cookies from baking sheet and allow them to cool on paper towels or a wire baking rack.