Preheat oven to 350 degrees F
Toast oats in a 350-degree oven for 10 minutes.
Mix flour, baking soda, xanthan gum, and salt; set aside.
In a large bowl, beat together oil, butter, or dairy-free substitutes and sugars.
Add eggs, egg whites, and vanilla, and mix well.
Fold in toasted oats, flour mixture, and chocolate chips.
Place rounded teaspoonfuls of dough on baking sheets lined with parchment paper.
Bake for 10-11 minutes. Let sit for about 5 minutes before transferring to wire racks.