Regarding offering of prasadam (for Beginners)
Srila Bhakti Siddhanta Sarasvati Prabhupada used to say that—“ Bhakti is the natural function of our soul.”
On the basis of this Siddhanta we can easily realize that due to the influence of Maya we cannot realize how purely we should serve Supreme Lord. To serve Supreme Lord we must go up to the level of transcendental purity, but actually, for new devotees ( specially those who are not initiated ) as such there is no heavy restrictions, but still just like a small child they can go on following some idealism set by previous Gaudiya Acharyas. This is not sadhana bhakti for them at present, because they are not initiated as yet, but still they can try practice. If at present they cannot follow those rules and regulations strictly, but still their soft emotion and faith can get the chance to climb a solid ground of devotional field in near future. At least they can go on hearing real Harikatha continuously to develop at least minimum purity to satisfy Bhagavan in near future after getting initiated by a bonafide spiritual master.
Regarding offering of prasadam (for Devotees those who are already initiated)
Devotees those who are already initiated by a bonafide spiritual master they must follow the strict rules and regulations set by Sri Srila Bhakti Siddhanta Sarasvati Prabhupada to develop flawless devotional mood ( niskapat bhava) to maintain both internal and external purity. They are requested to follow the arcan-paddati published from Gaudiya Matha to get detailed information about it. If they are already having basic knowledge for them the procedure of offering given below within a few lines—
1., Bhuta suddhi , then Guru –Puja, then Guru- Parampara – Puja, after that Gauranga Puja, after that Radha Krsna Vigraha can be worshiped.
2., Bhoga can be offered all in separate plates, for Guruvarga , Gauranga , and RadhaKrsna. With Tulasi Manjari for each plate. For each prasadam plate separate water glass should be there. Then offering mantra should be uttered for each plate for respective deities or photos. Or if you like to offer only one plate of Bhoga together with one water glass then first you will have to offer to Sri Sri Radha Krsna Vigraha, then secondly you will have to offer to Sriman Mahaprabhu, then in third stage you can offer that prasadam to all Guruvarga. But don’t forget to maintain all purity regarding your body, mind, etc. Items collected for Bhoga should be pure (not collected from a dirty materialistic personality). Also the cook-man should cook with full devotion. The man going to offer to Krsna should have flawless devotional mood ( without any duplicity ).
Shri Shyam Das Baba