Cream butter with brown and white sugars in a mixer or by hand.
Add the vanilla, milk and eggs. Combine flour, salt, baking soda, and baking powder in a separate bowl; add to the creamed mixture and beat to combine. Stir in the oats, chips and nuts.
Refrigerate dough for at least an hour (or longer).
Preheat oven to 350°F.
Drop each rounded scoop (don’t flatten) of dough 1-1/2-inches apart on greased cookie sheets (or covered in parchment paper).
Bake for 10-12 minutes. Remove them from the oven when they look almost cooked as they will continue to cook a bit on the warm cookie sheet.
Let sit 3-5 minutes on the cookie sheet, then remove to cooling racks.
Notes
* These cookies are both gluten-free and wheat-free. * I highly recommend taking the time to refrigerate the dough before baking as they will bake into a more "full" cookie – without refrigeration they will be tasty but flat. Gluten-free flour doesn't rise as much so this helps to compensate for that. * I used Cup4Cup gluten-free flour and Bob's Red Mill Gluten-Free Old Fashioned Rolled Oats. * Freezes well.