Short answer, in Shwetambar maryada, especially during Paryushan:

• A rajasvalā (menstruating) shravikā should not cook for others or serve food. This is observed for three full days; on the 4th day, after bath and fresh clothes, normal activities resume.
• For Ekāsanā/Biyāsanā of the family (especially the children), it is best that the food is cooked by a non‑rajasvalā person, or arranged from outside per your sangh’s practice. Food for vow-meals should not be cooked by the rajasvalā.
• If needed for her own health, the rajasvalā may take simple food for herself, prepared separately with care; but others should avoid taking vow-meals from it during those days.

Why this is observed

• Paryushan calls for higher shuddhi (purity) in dravya, kshetra, kāl, and bhāva. Traditional Shwetambar conduct treats menstruation as a time to refrain from temple/pujā, handling religious items, and preparing food for others, to preserve ritual purity and reduce himsā.
• On day 4, after snān and vastra‑parivartan, kitchen and utensils are cleaned and regular cooking may resume.

Practical suggestions for your home during Paryushan

• Let another family member cook, or arrange tithi‑bhojan/Sevā from sangh-approved sources.
• Choose vow-friendly items that can be prepared by others (simple non‑fried shaak, daal, rice, rotli, etc.) and keep timings per Ekāsanā/Biyāsanā rules.
• Follow your local Āchārya/Upādhyāy/saṃgh maryadā if there is any variation.

For a simple explanation of menstruation conduct and kitchen use, you can also see: