Preheat your oven to 350.
In a large mixing bowl, on medium speed add in butter, brown sugar, sugar, eggs, vanilla, baking soda, cinnamon, and salt on low speed.
Once completely combined add in the flour on low speed until everything is completely combined.
Then turn off mixer and add in oats and diced apples, fold these in with a spatula.
Scoop spoon fulls onto a cookie sheet about 3" apart and bake at 350 for about 15 minutes or until the edges are golden brown.
Enjoy warm or store them in a container.