The Buttery Goodness
Butter is a common ingredient used in many different foods; you can’t deny how the buttery goodness makes any meal even more delicious. However, getting pure butter for cooking is rather challenging in today’s world. Cheap butter is created by mixing it with margarine which alters the flavor while preparing certain meals.
Source: iqformat.life
Here is a vintage life hack to check if your butter is pure. Simply rub a small amount on a piece of paper and set it on fire. A refined smell means the butter is pure. An unpleasant foul smell indicates that there is margarine mixed in there.