These cookies are tall and hold their shape. I have tried bunches of recipes and after a little tweaking it is my favorite. The lemon juice helps to activate the baking soda, producing a softer, chewier cookie. The original recipe calls for putting the oats into a blender or food processor until finely ground. I have never done that as I think the oats add texture. The prep time is a guess as I have never really figured it out. These freeze great too.