Transfer the butter mixture to a large bowl and let cool slightly.
Whisk the remaining 3 tablespoons raw sugar, brown sugar, egg yolk, vanilla and molasses into the melted butter mixture. Stir in the flour mixture until combined.
Use a cookie dough scoop or spoons to scoop out about one tablespoon of dough at a time. Lightly shape into a ball and dunk half the cookie into the small bowl of raw sugar. Place each cookie on the baking sheet, sugar side up, leaving a couple of inches around each cookie.
Bake the cookies until the edges are set but the centers are still soft, puffy and underdone, which will take 9 to 12 minutes.
Let the cookies cool on the baking sheet for ten minutes, then serve warm or transfer to a cooling rack.