
Pedro Ximénez sherry is a naturally sweet, dark fortified wine from sun-dried Pedro Ximénez grapes.
Raisin sweetness at the very top of the sherry scale — it is one of the sweetest fortified wines made, so anything else in its place leaves the drink drier than the recipe expected. Body is the other half, and lighter bottles pour thinner.
PX is naturally sweet and single-variety: all the sugar comes from sun-dried grapes. Cream sherry is a blended style — a dry base such as oloroso or amontillado, sweetened afterwards. Cream is lighter and less syrupy, so a drink built on PX loses its body and its raisin depth with it.
Pedro Ximénez grape variety (as a table/dry wine)
"Pedro Ximénez" names both a white grape and the sweet fortified style. The same grape also makes dry table and dry fortified wines, especially in Montilla-Moriles, and those are not sweet PX. Pour one into a recipe that wants the sweet style and the drink comes out dry and thin.
As a fortified wine, it lasts weeks to months in the fridge once opened, though it dulls over time.