Where I live (mountainous region in Austria) they are everywhere. I just go hiking for a bit so I’m at not too frequented spots and then I can just pick as many as I need, often the floor nearly is more yellow than brown on certain spots.

We don’t have white oaks here but they typically grow in needle forests.

(And we call them Eierschwammerl = egg mushrooms, to explain my previous comment)

Image

Image of a typical spot, took it a month ago ^