There is no single household masala chai
Different spice balances can all make sense in masala chai. Learn what a particular household or maker values before looking for a universal formula.

A name is not a complete recipe
Masala chai suggests spiced tea, but the name does not specify one compulsory combination or proportion. Different makers can favour different spices, tea strength, milk balance, and sweetness. A commercial blend is one maker's choice, not a complete record of what every household prepares. Reading two ingredient lists side by side is often enough to see that a familiar name can hold more than one flavour direction without either product needing to be dismissed as wrong.
When someone offers a household version, start with the cup rather than a checklist. Notice which aroma is most apparent and how it sits beside the tea. You might find a bright ginger character or a warmer, rounder spice impression. Ask what the person likes about their version. That question leaves room for taste, convenience, and family habit instead of requiring them to defend the drink against a recipe you found elsewhere.
Learn details without demanding a family story
A recipe may be passed down, adapted, bought as a blend, or assembled from what happens to be available. None of those possibilities needs an invented romantic explanation. If the maker wants to share measurements or ingredients, write them down accurately. If they describe quantities by eye, accept that the written version will be approximate. You can ask which ingredient should remain in the foreground rather than insisting on exact numbers the person does not normally use.
For a purchased mix, distinguish a spice blend from a product that already includes tea, milk ingredients, or sweetener. The package directions and ingredient list tell you what has been combined. A powder may be designed for a very different use from whole spices. This is a practical distinction, not a judgement about which household method is superior. It helps you buy something that fits the drink you intend to make without accidentally doubling ingredients.
Describe your own variation honestly
If you adapt a version at home, name the change plainly. Less sweetness, a different milk, or a stronger ginger emphasis can be personal choices rather than claims to improve a tradition. Keep a short note of what worked so that you can repeat it. The point of learning from another person's chai is not to freeze it into the only permitted formula. It is to understand enough of their balance to make thoughtful choices in your own kitchen.