A serving of steel cut oats is ¼ of a cup and we normally do ⅓ cup dry for a serving. When cooking steel cut oats the ratio is 3:1 water to oats. So for 1 cup oats you will use 3 cups water ( or milk). If you want a thinner jar of oats use ¼-1/3 c more liquid. You can also heat these up in the microwave if you want them hotter. I find leaving them at room temperature and adding in the heated up coconut milk heats it up sufficiently.