That’s a great question!  It’s very important to scale down recipes when working with nonstandard amounts.  A good way to do this is to reduce each ingredient by half, and bake the cookies for half the time that it recommends.  We recommend following the recipe exactly to make sure the cookies turn out well, but you can also get a pretty good idea of how a recipe works even if you don’t have the exact amounts specified.  If you don’t need 24 cookies but just need 12, it would help to pick either 12 large cookies (3 inches in diameter) or 6 medium-sized cookies (2.5 inches in diameter).  You can also cut the quantities back in half, and reduce the oven time by half also to get properly-sized cookies.
assistant
Yes, that sounds reasonable.  There are a few ingredients where half might even result in a slight decrease in overall healthiness, though - you could also substitute unsweetened vanilla almond milk for regular milk, for instance, to achieve a little extra healthiness.
assistant
Are oatmeal cookies healthier than others?
user
Yes, compared to many other types of cookies, oatmeal cookies are particularly high in certain nutrients. They’re a great source of fiber and B vitamins, which can reduce the risk of cardiovascular disease, cancer, and cognitive decline, and can help keep gut bacteria maintained, which in turn boosts digestion and metabolism. They also contain a number of trace minerals like manganese, magnesium, and phosphorus. They’re also an especially good source of zinc and selenium, which can boost the immune system and protect the skin from UV damage.
assistant
Good to hear because I like oatmeal cookies.
user
Oatmeal cookies also contain cholesterol, which most people need to restrict from their diet. Overall, oatmeal cookies are actually quite healthy compared to many other types of cookies, but it’s still recommended to limit their intake if you want to be healthy.
assistant
Do you have a good recipe?  I would like to make them at home.
user
Great!  I can help you find some great recipes, so we can make some healthy oatmeal cookies at home.  Here’s an easy recipe I found on Allrecipes: https://allrecipes.com/recipe/oatmeal-cookies/.  What do you want to start out with - just a plain recipe, or some flavored oatmeal cookies?
assistant
The link works.  Thanks.  The recipe is for 24 cookies.  If I want to make 12 only, can I just use half of each ingredient but keep the oven temperature the same?
user