I consider myself a quesadilla zen master.
I always use a thick bottomed 12" non-stick pan on medium heat. For standard soft taco sized quesadillas i melt about 1/2 T of butter in the pan and once it starts to melt, kill the heat. I then let it continue to melt. When it's about 90% melted i take one of the tortillas, throw it down in the pan, and spin it around in a circle. I take it out, put it melted butter side up on the counter or cutting board, and repeat with the second one.
I then put down a layer of cheese, followed by meat, followed by more cheese and finally the top tortilla. I blast the heat until it starts to sizzle, then i dial it back to medium. I cook it until well browned, then flip and repeat. The second side takes about 1/3 the time as the first.
When fried correctly, a flour tortilla takes on a fluffy, flakey and crunchy texture. If you use too much butter it doesn't brown right and the excess won't even absorb, which makes it greasy and it won't crispy either.
Garnish with lettuce, full octane sour cream, guac and salsa.
Should look something like this when done.
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