It depends on how you cook it
Roasted (my fav way) they cook soft and are a little sweet, If cooked in chicken stock or a spoon of butter that reduces the sweetness a little but adds a little something My tastebuds can’t put into words hahaha roasting can take up to 1hour and 15 minutes
The taste is hard to discribe but if you try them make sure you cook them well and until there soft. if you eat them before they are soft they can be a little peppery but not mouth burning or anywhere close. just a hint.
You can boil them to, they are much more plain and boring like that but boiled turnip does go well with mashed potatoes.
You can mash them with carrets 50% carret 50% turnip and that also tastes good (my mum and sister love turnip this way) great with mashed potatoes too.
Hope this helps
LONG LIVE THE TURNIP lol