Preheat the oven to 375 degrees. Line a large baking sheet with parchment or a Silpat and set aside.
Combine sugars and butter with an electric mixer until creamy-this will take about two minutes. Add the egg and vanilla. Mix until well combined.
In a separate bowl combine the salt, baking powder, soda, flour. Whisk together. Add flour mixture slowly to the wet ingredients. Mix until just incorporated.
Stir in the oats, chocolate chips, and dried cranberries.
Make dough balls-about 1 Tablespoon of dough per cookie. Bake for 10-12 minutes, until the cookies are lightly browned around the edges and starting to set. Remove from oven and let cool on baking sheet for about three minutes. Transfer to a wire rack to finish cooling.