Green’s Dictionary of Slang

homebake v.

also bake
[the use of heat in the manufacturing process]

(orig. Aus./N.Z. drugs) to manufacture homemade heroin or morphine from codeine phosphate; thus homebaker n., one who does this; thus homebaking n., the process.

[UK]New Scientist 20 Apr. 🌐 The emerging problem of ‘homebaking’ illicit drugs could be nipped in the bud [...] although homebaking is time-consuming, it becomes more cost-effective when police and customs crack down on illegal heroin imports, limiting the supply.
[NZ]N.Z. Herald 1 Apr. 🌐 Commissioner for Children Roger McClay has called for youngsters to be taken from irresponsible parents caught homebaking drugs.
McGill Reed Dict. of N.Z. Sl 104: Homebake Illegal production often in a home of morphine or cocaine rock from cooking codeine phosphate, often retailed to the street community by organized gangs.
evidence to www.parliament.wa.gov.au 17 Mar. 5: Somebody was accused of selling huge quantities of over-the-counter medications that contained codeine in the knowledge that it was going to a home baker to make heroin for sale on the streets.
posting at www.medhelp.org 3 July 🌐 I was a homebaker (heroin drug abuse cook) for many years and pure codeine [...] (15, 30 and 60mg) pills was the grousse dope .
[UK]Unknown T ‘Mad about Bars’ 🎵 How many nights had to bake in the Bando to get that guap?