It is important to let the butter & egg come to room temperature. I usually let them both sit out for about an hour, then get started.

Preheat oven to 350 degrees In a medium size bowl combine first five of the ingredients & whisk until combined.

One important thing to keep in mind is not to over mix, this is fatal to your cookies. In a separate bowl beat butter & sugars until light and fluffy. Add in egg & vanilla until combined.

Slowly mix in the dry ingredients.

Cover and refrigerate for at least 2 hours, better yet, a full 24 hours.

Drop rounded tablespoons onto cookie sheet lined with parchment. Keep an eye on your cookies, mine are usually done within 10-15 minutes, sometimes I find they need a couple extra minutes.