Short answer: Yes, you may eat biscuits in Jainism only if they meet Jain food rules.

Checklist before eating any biscuit

• 100% vegetarian (look for the green dot). No egg, no egg powder.
• No honey, gelatin, or animal fat/shortening.
• Prefer plant‑based emulsifiers (E471/E472 from veg source), soy lecithin (E322). Avoid L‑cysteine (E920).
• No alcohol‑based flavors.
• Prefer non‑fermented products. Many Jains avoid yeast/bread‑type biscuits.
• Check sugar source if you are strict (some prefer sugar verified without bone‑char).
• Fresh and eaten only in daylight (no eating after sunset).

When to avoid biscuits

• During Paryushan/Chaturmās many follow stricter rules: avoid packaged/processed and any fermented/yeast items; keep food very simple. Both Śvetāmbara and Digambara observe stricter simplicity; Digambara practitioners often go even plainer. See:
• If ingredients include root‑based additives (rare) or doubtful animal‑derived additives.

Safer practice

• Choose simple, eggless, honey‑free, veg‑source biscuits; or make fresh at home (daytime), with flour, sugar, oil/ghee, water/milk, and baking powder only—no fermentation.

Why these rules

• Ahimsā: avoid harm to beings (therefore no eggs, honey, animal products, fermentation that multiplies micro‑organisms). Basic Jain diet overview: