LOL Remind me not to eat any of your home made biscuits!
I haven't found the corn starch to stop it instantly, but with a bit of it, a tissue and a little pressure it didn't keep bleeding for long, or much, at all. It's hard to avoid cutting the quick, but if at all possible, it's best to learn a method that avoids it entirely (which is why I have advocated the 'press, press, clip' method for years) and maybe cut much less off each nail and do it more frequently to avoid nearing the quick totally.
PRESS, PRESS, CLIP METHOD:
Set the clip on the spot where you will cut a nail while holding the bunny. Press the nail without cutting. Press again same spot without cutting, if the bunny does not pull away, 3rd time cut. What this does is have the bunny work with you as a warning if you touch the quick. If the bunny yanks the foot away, you have touched it. Go back, find a spot closer to the tip to press, and do the 3 tries again. Say it out loud to help you remember. Kind of a sing song way of doing it. Your voice can even be soothing to your bunny as you do it.