To be safe, do your figuring in doubles, but "fudge" a little, so it's more like 1 & 1/2 to 2 per person. For baked potatoes, at least 1 per person, so make 2 per person, total 12 potatoes. You should always 1 and 1/2 or double mashed potato recipes when you aren't sure how much each person eats generally. So 12 potatoes would be 24 for mashed. In casseroles, you'd use about half to three-fourths, because the casserole has other ingredients. If sliced and browned with onion rings, at least double.
The good thing about potato dishes is most people eat it and eat more than they think they will, and with potatoes you can always use the leftovers, such as mashed potatoes for fried potato cakes.
you would probally have to have a potato each and one extra all the time soit would be an equal amount of mash also by the time you mash it you will probaly end up with 6 anyway x
however many you want to use
I find that 5 medium sized potatoes is good for 3 people. So for 9 it would be 15 potatoes. If you want extra do 20.
Mash them.
sausages and mash potatoes
maybe if you mash them there`s barley any difference
Salt, pepper, butter, chives and/or gravy.
mash potatoes
That would depend on how much else you are going to be giving them and how hungry they are. Think about how many whole potatoes you could eat then multiply this by 11 for the mash.
Make chips, mash them.
40 portions
squigdgy ones.
Singular- PotatoPlural- Potatoes
MASH potatoes are from the regular potatoe just mashed!