The cake recipe your family fights over is just flour and sugar. What they’re fighting for is the person who made it.
STILLNESS
STILLNESS
An argument about a recipe is hardly ever about the recipe. It is about who gets to carry a piece of somebody, and about making sure the way they did it does not vanish. Food is a convenient place to store that, because you can taste whether it is still right.
Get the recipe written down from whoever still knows it, including the parts they do by feel. Then make it badly once while they can still correct you.
Whose cooking does your family argue about getting right?
Free, with nothing to buy inside it.