Spitfire Ale Clone

Ingredients:

Malt:

3500g Maris Otter
410g Amber Malt
370g Crystal Malt
370g Torrefied Wheat
180g Wheat Malt

Hops:

1oz East Kent Goldings (60 min)
1oz Target (60 Min
1/2oz East Kent Goldings (15min)
1/2oz East Kent Goldings (dry hop)

Mash all malts at 65c for one hour in 3.75 gallons of water.
Sparge as usual.
Boil for one hour with hop additions, irish moss is up to you (i don't use it).
chill, pitch yeast.
Dry hop in secondary for 3 to 7 days.
bottle.
done.

Hi, I'm going to give this a try but there is no mention of how much yeast to use, is it the standard half pack (approx 5g for a 1 Gallon batch)?

Thanks

One pack of s04 does the trick for me
I wager that if you use Wyeast 1335 or 1098 it will taste better

What type of crystal malt?