Clarified butter (ghee)

Just for information: 5 cubes (1kg) of Pilos 82% butter (Lidl) yields approximately 750g of clarified butter. This is due to the evaporation of water, quite a large amount of protein and some filtering losses. The price for 750g is about PLN 15 (I do not count that you have to heat it on low heat for 1-1.5 hours), where the quality is, in my opinion, much better than "typical" clarified butter.