One normally has food in the place of stay but there are numerous small eateries.
Deoghar has some food specialities:
Peda
A type of milk-based sweet-meat is the deoghar speciality. a visitor to deoghar must not miss it.
Tilkut
Made of til and sugar mixed and crushed together, mostly available from the month of december to february.
Rabri
Made of condensed milk, available throughout the year.
Paratha
Made of flour filled with sattu and potato and blended with pure deshi ghee, famous location 'parathas of luchhu shah' in the mandir lane, any one can point you to the shop when asked for.
Bel ka Morabba
Another speciality of deoghar available form september to march.. one must try this .
Langra Aam
Deoghar's another speciality is its langra aam. one must never miss it.