SB 8.16.40
srtam payasi naivedyam
saly-annam vibhave sati
sasarpih sagudam dattva
juhuyan mula-vidyaya
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
If one can afford to, one should offer the Deity fine rice boiled in milk with clarified butter and molasses. While chanting the same original mantra, one should offer all this to the fire.