Floury potato

Aloo

Weight-only; no spoon or piece conversion needed.

Instead of Floury potato

Maris piper potato
Use the same weight; it is reliably floury, so mash or roast as directed and adjust salt and liquid to taste.
Potato
Use the same weight and choose an older, starchy potato; it may need slightly less liquid when mashing.
Sweet potato
Use the same weight; it is sweeter and less starchy, so reduce added sugar and watch it soften faster.