Ever wondered why your grandmother threw a teabag into the pressure cooker while boiling chickpeas, or why she measured using the knuckle of her index finger? Why does a counter-intuitive pinch of salt make your kheer more intensely flavourful? What is the Maillard reaction and what does it have to do with fenugreek? What does your high-school chemistry knowledge, or what you remember of it, have to do with perfectly browning your onions?