Rub or spray potatoes with oil and place them into the air fryer basket or basket of the Ninja Foodi.
Cook at 400*F for 30 minutes.
Carefully remove the potatoes and slice them in half. Let them cool for 10 minutes.
Scoop out the middle leaving a border along the potato skin for structure.
Place the scooped out portion into a medium-sized bowl.
Add butter, milk, brown sugar, and cinnamon to the potatoes and mash or beat on low speed until well blended.
Top each potato skin with the potato mixture evenly, 1/4 of the mixture in each potato.
Carefully place the potatoes back into the air fryer basket.
Sprinkle with pecans.
Cook for an additional 3-5 minutes at 400*F. The inside should be hot and pecans toasted, but not burnt.
Notes
If you are using a Ninja Foodi, follow the same steps using the "Air Crisp" function along with the Air Crisp basket.These can be topped with marshmallows and additional cinnamon too.