try and error: Just experiment with things, change one single thing and observ what difference it makes (Eg.: season half batch before, half batch after)
Research on the internet, I mean there are tons of blogs/forums where ppl sharing their experience, just be mindfull, and take everything with a grain of salt (hah!) (Eg.: One anon in reddit collected brownie recips and methodically tested and documneted each approach and what difference it makes, so technically his/her/they recipe is not a single one, but a collection family of recipts where you can choose your desired results)
Educational-Cooking channels, there are plenty of cooking channels which are showing the underlining science and connections, just to name a few: MinuteFood@yt, aragusea@yt
or if you want hardcore data: Talon_Fitness@yt
My approach: