To properly measure out the flour, fluff it first with a fork or a whisk in the container you store it in. Then spoon it out into a measuring cup (for dry ingredients; no spout) and level off the top.
Follow my recipe for buttermilk substitute: https://www.crunchycreamysweet.com/buttermilk-substitute/
Please note, that the nutrition value can vary depending on what product you use. The information below is an estimate. Always use calorie counter you are familiar with.
Serving size: 3 pancakes per person. This recipe makes 12 pancakes.