What is the main ingredient of plum pudding in A Christmas Carol?

Oh, dude, the main ingredient of plum pudding in "A Christmas Carol" is, you guessed it, plums! Just kidding, it's actually a mix of dried fruits, spices, suet, breadcrumbs, flour, eggs, sugar, and sometimes a splash of brandy. But hey, plums are in there too, so it's not a total lie!