Add ingredient X or ingredient Y in quarter- cup increments ...
--- Does "increments" here mean that I should be slowly adding more and more if needed?
You usually see that sort of direction when you are to add something to a mixing bowl while the mixer is running. You add a little at a time, because the flour will poof all over the place if you dump it all in at once, or because what you are adding is so hot that too much will cook the egg that's already in the bowl, or a hundred other reasons.
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You usually see that sort of direction when you are to add something to a mixing bowl while the mixer is running. You add a little at a time, because the flour will poof all over the place if you dump it all in at once, or because what you are adding is so hot that too much will cook the egg that's already in the bowl, or a hundred other reasons.