Unfortunately, the secret of Soma (Haoma) is lost. Here are two verses from the hymn that my (supposed) ancestors (supposedly) wrote in RigVeda (
http://www.sacred-texts.com/hin/rigveda/rv09097.htm):
"As he is purified he pours out treasures, a God bedewing Gods with his own juices.
Indu* hath, wearing qualities by seasons, on the raised fleece engaged, the ten swift fingers."
* It is another name for Soma. Ten swift fingers pertain to ten months of the year (the old Roman calender, excluding the two-month's Arctic night). Wearing qualities by seasons - the sun shines differently in different seasons.
"To feast him, flow mid, song and hymn*, to Vāyu, flow purified to Varuṇa and Mitra.
Flow to the song-inspired car-borne Hero, to mighty Indra, him who wields the thunder.
* A request to the priests that they should sing praises to Gods sweetly. Vāyu - the Aryan wind God. Soma juice was mixed with cows' milk and was sweet in taste. It was filtered through three layers of sheep wool.