Let’s talk about salad dressing. The one shown above is:
It makes a little more than 1/2c of dressing. More loosely, this can be broken down into:
Depending on what you pick for each slot, you can get a wide variety of dressings out of the exact same base recipe. The rule of thumb is to put everything in a measuring cup, starting with the thickest or oiliest ingredients and to blend everything else into that, so you don't end up with weird floating lumps.