Could be a Blewit (Wood blewit / Lepista nuda). To distinguish with more certainty check for staining yellow with KOH. In case you do not have any KOH at hand, when cut in a vertical cross section the Cortinarius largus will be lilac to violaceous becoming white in the centre of cap and stem.

In coniferous and mixed forest, often on calcareous soil

Unknown, not recommended

• ▸ Stocky fruit body with a pale grey-brown, viscid cap
• ▸ Pale lavender-grey gills, later rust-brown from the spores; cortina on young specimens
• ▸ Firm, pale, club-shaped stem with a bulbous base
• ▸ Flesh of cap and stem lilac to violaceous, becoming white in the centre when cut