Jumbo oats are simply rolled whole oats. These jumbo oats from Sussex Wholefoods are made from the whole grain and are organic. They are used to make flapjacks, and also in biscuit recipes. They can also be used to make porridge. Because the flake size of jumbo oats is larger than with rolled oats (jumbo oats are whole rolled oats, whereas standard rolled oats are made from split oats), the resulting porridge will be heartier, thicker and more filling.