Cream butter with electric mixer. Add sugars, vanilla, milk and eggs. Mix until blended. In a separate bowl, combine the flour, baking powder, baking soda and salt. Add to the creamed mixture and mix together. Stir in the oatmeal and pecans.
Spoon out by teaspoonfuls onto greased cookie sheets. Bake for 8-9 minutes in a 350°F oven and cool on a wire rack.