In a large bowl, cream together the butter and sugars until light and fluffy.
Scrape down the bowl, add the egg, salt, and extract. Again beat until light and fluffy.
Add half the oat flour and all the baking soda and mix thoroughly for about a minute.
Add the rest of the flour and the chocolate chips and mix to incorporate.
Line a baking sheet with parchment, foil, or a silpat. Drop dough onto sheet in 2Tbsp increments, spread a few inches apart. You should be able to fit 12 on a standard sheet.
Bake for 10-12 min until the edges just start to get golden brown.
Cool on sheet about 5 minutes to set before eating.
Notes:
You can modify the ratio of white/brown sugar for a lighter or darker cookie.
The dough freezes really well. I like to portion out 2Tbsp balls of dough and freeze them in a plastic container. Then bake as normal from frozen for around 13 minutes or so.
These can be baked bigger or smaller than the recipe indicates, but baking times will vary.