Once those are light and fluffy, beat in the eggs and vanilla, again until it's light, airy and completely combined.
Add in the oats, mixing until they are through the dough.
Take your Halloween candies and mix them in by hand.
Line your cookie sheets with parchment paper.
Take a golf ball sized scoop and roll into a ball. Then flatten them either between your palms or on the cookie sheets. Fit six to a sheet. Or, if you choose to do larger ones, space accordingly. You must flatten them to achieve the flat yet chewy goodness you see in the photo.
Bake in the 350 degree oven for 7-8 minutes, watch them carefully, then pull them out when they look browned. They might be a little "soft in the middle" good! Cool them on the sheets completely.
All calories and info are based on a third party calculator and are an estimate. Actual nutritional info will vary with brands used, your measuring methods etc.