Crumble a couple of Nutriberries into the mixture, because the seeds attract the bird. The seeds in Nutriberries are already shelled too. You want the mixture to be on the dry side, but if it's too dry, add some unsweetened, plain applesauce, preferably organic. Whether cookies or cake,  spray pan or cookie sheet lightly with a cooking spray. Everyone's oven is different and this mixture is a tad different every time, so bake at 350 F  approximately 20 minutes, sometimes as much as 30-35. It's usually more successful to crumble one cookie, or a small piece of the cake at a time into a separate food dish. Keep refrigerated, because there is no preservative. The number and size of your fids will determine how much of it you want to freeze.