הלכה על מנחות 100:4

From the laws of the commandment is that which they, may their memory be blessed, said (Menachot 50b), "How is the making of the grilled ones of the high priest? He brings a whole issaron of flour, and divides it" with the half issaron measure in the Temple. As even though the meal-offering of the issaron was offered in halves - meaning to say, half of it in the morning and half of it in the evening - it is not sanctified in halves; meaning he brings it all together. And he brings with it three log of oil and mixes the fine flour with the oil and scalds it in boiling water. And he kneads six loaves from each half issaron - it comes out that there were twelve loaves - and they were made one by one. And how does he make [it]? He divides the three log with the reviit measure in the Temple - one reviit for each loaf - he bakes it a little and afterwards roasts it on the griddle with its oil, but he does not cook it much. And afterwards he divides each loaf into two, so that he offer half [of it] in in the morning and half in the evening. And he takes the halves, doubles each one up into two and crumbles it, until you find each crumbling doubled up into two. And he offers the halves with half a handful of frankincense in the morning, and the remaining half [of the offering] with the [other] half handful of frankincense in the evening. And it is completely for the fire.