Add butter to stand mixer and start to cream on the medium low setting (1 or 2). Add sugars. Once fully mixed in, add eggs, one at a time. Once fully mixed in then add vanilla.
In a separate bowl, combine flour, salt, cinnamon, baking soda, and baking powder. Then slowly add to stand mixer.
Once fully mixed, turn off mixer and remove bowl from stand. Use a spatula to fold in oats and butterscotch chips (hold out a ¼ cup for after cookies are baked).
Cover bowl and place in refrigerator for at least 30 minutes (up to 24 hours) **At least 2 hours is ideal.
Preheat oven to 375degF.
Use a food scoop to portion out cookies onto a parchment covered baking sheet. Bake for 8-10 minutes (should be slightly golden on top). Remove from the oven and push 4-5 butterscotch chips into the top of each cookie. Then remove cookies to the cooling rack. Repeat until all of the dough is baked.