Sweet tooth (Hydnum repandum, wood hedgehog, prosenjak) is a very popular and easily recognized mushroom. Hydnum repandum is a mushroom that grows in Europe, Asia, Australia, and North America. It can’t be mistaken for any poisonous mushrooms because of its specific look.
What does Hydnum repandum look like?These mushrooms grow in groups, scattered or in fairy rings. It has irregularly shaped caps that variate from pale yellow to orange.

Caps are usually smooth and dry. Small and young mushrooms can be round but big mushrooms are always irregular. 
Hydnum repandums meat turns a slightly orange color.
What makes this mushroom special are spines under the cap. These spines are the reason why it’s also called wood hedgehogs.
Spines are from 3-10cm long depending on the size of the mushroom and they easily peel off.

How to eat and prepare it?
The sweet tooth has a sweet nutty flavor. It is considered to be a good mushroom that stays firm after cooking.
Before storing the mushroom brush the cap and scrape off the spines. Cook them in boiling water before storing them.
The best way to store them is to marinate them in vinegar or oil.

Can it be mistaken for other toxic mushrooms?

Hydnum repandum can’t be mistaken for toxic mushrooms. It can be mistaken for other Hydnum varieties but all of them are edible and have very good quality.
Mushrooms can be mistaken for Boletus when looking at them from far away but after turning the mushrooms spines are very noticeable.