In a large mixing bowl, combine butter, granulated sugar & brown sugar & beat well until light & fluffy.
Add in the egg, milk & vanilla & beat until well mixed.
Slowly add in the salt, baking soda & baking powder, mixing until just incorporated.
Slowly mix in the oats, flour & crushed RITZ Crackers until just combined.
Fold in most of the chocolate chunks.
Cover the bowl & refrigerate at least 1-2 hours.
Once the dough is properly chilled, preheat oven to 375 degrees.
Line your baking sheets with parchment paper & drop tablespoon-sized scoops of cookie dough on the parchment, placing the scoops approx 1-2 inches apart.
Bake for 8-10 minutes.
Top with remaining chocolate chunks if desired.
Cool on the baking sheet for 2-3 minutes before transferring to a wire rack to cool completely.