On Saturday I stuck the wheat back into the oven and turned the temperature up to about 50°C for a couple of hours with the fan on full. Then we went out and left it to cool. Final moisture content was around 5%, perhaps a little high but I didn’t want to push it any further.

And then the fun began. I spent an hour milling the grain with a spice mill

and then soaked it in warm water (52°C) for an hour or so — ‘mashing’. Next it was into various pans to bring the temperature up to 68 – 70 °C for the mashing out (meant to be half an hour, but with the aforementioned friends around I think the best we can do is ‘indeterminate’):

Finally I added Tettnang hops to the big pan and boiled for half an hour, before straining the whole lot into a fermenting barrel, stirring in some dextrose and making the volume up to 23 l with cold water. The mash volume was rather less than I was expecting; I think next time I should squeeze out what I can from the malted wheat and then sparge it with hot water for a second extraction. My starting specific gravity was only 1040 with the dextrose added, so a little low (i.e. the brew is too dilute).

Sunday morning I was a little concerned to find that fermentation had started (small fizzy bubbles at the surface) but when I added the yeast it went completely mental (‘vigorous’) and today (Tuesday), fermentation is about finished, with SG = 1005. So by the time I’ve added priming sugar to the bottles, we’re looking at 4.5 – 5 % ABV, which isn’t too shabby.

And here’s how I’m going to dry it:

Next stage is to incubate at around 40°C for 24 hours, to drive off the moisture and make crystal malt. The inside of the kettle reached 52°C this afternoon, which is a little bit warm, but rain is forecast tomorrow and I’ll leave the vents open.

The trick is to dry the grain, not to cook it (which kills the enzymes). Even if it does get that hot, I’m not too worried because the actual mash step (when the maltase converts the starch to sugar) is supposed to be at around 55°C, and the grains already taste sweet. This means that even now the malt has a fair sugar content. If it wasn’t forecast to rain, and if I wasn’t worried about rats and possums (spit. Bastards) I’d just leave the lid off to sun-dry them.

And here it is ready for germination

Mash into 6 qts. water at 127° F, then allow 45-minute protein rest at 122° F. Raise the temperature to 151° F and maintain for 90 minutes. Mash out at 167° F and sparge with 6 qts. 170° F water. Add hops and boil for 90 minutes. Cool to room temperature, aerate, and pitch yeast. 

As those of you who have have been paying attention will know, we’re brewing our own beer. But tonight, I’ve gone hardcore, and am attempting to make a wheat beer by malting my own grain.

For various reasons we have (‘had’, now) a half-hundredweight sack of wheat. I have taken 5 kg (= approximately 2 lb per gallon for a 23 litre barrel. I know, I know), washed it to remove the chaff, and will now soak it overnight. Then I’ll perform some magic and malt it. Then I’ll make beer.

Watch this space. . .