Brewing hoppy beers for LSE homebrew competition

For the 2016 comp I decided to concentrate on hop forward beers and as such brewed the following:

• US Pale Ale
• US IPA
• DIPA

For hoppy beers the ideal thing would be to brew them so they will be in the bottle the minimum amount of time before the comp, however due to work I will have to brew them 3-4 weeks earlier than I would have liked, so these beers will be as much a test of my bottling process as they will the brewing its self. The key here will be limiting oxygen exposure during bottling even though they will also be bottle conditioned.

Anyway on to the crux of what this blog post is about – brewing hoppy beers and the process I will be using to brew the USPA, IPA and the DIPA, the process will be the same and it is the process that is the important bit!

Recipe formulation
If you don’t brew a beer to the style guidelines you really are making life difficult for yourself! There is more than enough information on the web to point you in the right direction and gives plenty of detail on recipe design – The Brewing Network – Can You Brew It show is a great place to start!

The grists
The base malt should be low colour pale malt, low colour Maris Otter if you can get it but low colour is the important bit. You want to be able to build in the malt base not be stuck with what you have been given by the base malt.

I have used a variety of grist over the years for Pale Ales and IPA’s and I now have a couple of grists that I have honed in, the one given below is for the PA I will be brewing for the LSE 2016 comp.

90% Low colour pale ale malt 4ebc
5% wheat malt 4ebc
3% Cara pils 4ebc
2% Caramalt 30ebc

The only difference for the IPA is that 7.5% of the pale ale malt is substituted for munich malt, this is simply to give the beer slightly more malt base to support the high IBU’s and bigger hop flavour.

The DIPA is a bit different it is simply 94% pale ale malt and 6% dextrose to make sure the FG is around 1.008! The idea here is the malt is simply a platform for the big hop aroma.

The mash
A single infusion mash will more than do the job, and even though I have a RIMs system both the pale ale and the IPA will get a single infusion mash for 60 min. The RIMs system will however be used to stabilise the mash temp and guarantee a clear wort for the transfer to the boiler.

The DIPA will be mash at 64degC for 60 min the ramped up to 68degC for 10min before being ramped up to 74degC for mash out, this is to ensure a very fermentable wort.

I am trying to move away from stepped mash temps as if I ever have the daft notion of going pro trying to conduct step temp mashed on a budget will be tricky although not impossible – I have a cunning plan!

The hops
The PA and IPA will receive a small bittering addition of Columbus totalling 10 IBU’s at the start of the 90min boil, and then the rest of the hops will go into the whirlpool. All hops are big popular US varieties like Citra, Mosaic, Simcoe, Centennial and Columbus.

So into the whirlpool, and a big addition of hops is added for a 30min stand. The temp of the wort in the whirlpool is upwards of 97-99degC. Both of these beers will be 50L batches and the hop additions will be 220g from the PA and 340g for the IPA, the PA will get 45ibu’s from this addition and the IPA 60ibu’s. I’m taking a bit of a risk here with the IPA, I’m backing off the bitterness and really loading up the Whirlpool and dryhop additions to see if I can produce a softer more fruiter hop aroma centred beer as apposed a bitter kick in the teeth, which in the past is what I have had success with.

As were are on the topic of whirlpool additions its worth noting that Brewdog has a heat exchanger fitted in between their kettle and whirlpool and they now drop the temp of the wort down to 80degC for the whirlpool addition, this means they are no longer isomerising as many of the hops acids so are getting a small contribution of IBU’s from this addition but they are getting a better flavour and aroma from the whirlpool additions. At the other end of the brewing world this is also something that the Tennent’s brewery in Glasgow does and latest research from VLB supports that the best aroma is gained when whirlpooled at 80degC ish. This is something I am very interested in trailing but would need to get a small heat exchanger made up that can deal with hop material without blocking for the transfer.

The DIPA will be bittered with hop extract and then also receive a hop addition of 300g at 15 min to go before also receiving a massive whirlpool addition in the order of 450g, again for a 50L brew length.

For big hoppy beers I really believe you should be using hop pellets for both the best flavour and aroma, to start with they have had 10% of the hop leaf material removed hence the name T90, they store better both from a size point of few and less prone to oxidation, and most importantly they can be used in a whirlpool!

This is the bit I don’t understand in the UK most craft brewers are avoiding the use of the whirlpool they are just knocking out directly from the boiler, you can easily say the brewers in the US are leaps and bounds ahead of the UK when it comes to big hop aromas and flavours and I think a lot of this is all due to the use of hop pellets and the Whirlpool (and yeast but will get to that shortly). The whirlpool or at least whirlpooling is key to great hop flavour and aroma – in my opinion, it also ensure that the least amount of hot break material makes it into the fermenter which is also very important for product stability.

Dryhoping of all 3 beers will take place once the primary fermentation has died down. The PA will receive only one addition, the IPA and DIPA will be double dryhopped. Time on the dryhops is limited to 3-4days per addition and all additions are made at 19-20degC. If a 2nd addition is to be added like in the case of the IPA and DIPA the first addition and the remaining yeast will be dropped out of the conical. Once all dryhoping is complete the beer in the conical is crash cooled to 2degC for 5-7days.

The PA will receive a single 50g addition, this is simply to lift the final aroma a notch as to be honest the aroma from the whirlpool additions is more than enough. The IPA will receive 2 dryhop additions each addition being 250g and contact time will be 3days per addition. The DIPA will receive 2 dryhop additions, each addition being 400g! Again contact time will be limited to 3 days per addition.

Nothing mentioned above is rocket science, but the secret to getting good hop aroma in building the layers of flavour from the hops and then limiting contact time with the hops and most of all keeping oxygen away from the beer!

What yeast
Dried yeast makes good beer but if you know how to handle wet yeast then you can make fantastic beer. I have been brewing with a wide variety of yeasts over the last 18-24 months or so and my favourite yeast has been Wyeast 1318, London Ale 3, it is my go to yeast for British styles and non dryhopped beers. This yeast combined with Citra hops in a 3.8% session pale ale is exceptional but when it comes to big IPA’s that are heavily dryhopped I just can’t get past the lack of clarity of the beers it produces. Even though they taste fantastic and I would happily drink them all day long at home, but for competitions they are just going to get marked down – it’s a shame but it’s the truth of it.

As such I end up coming back to WLP001 and WLP007 probably the 2 most used strains for brewing IPA’s in the USA. In the UK this accolade would most likely go to US-05! The safe option and the yeast I have had most success with in the past is WLP001 but this time I thought I would try something a little different – WLP090, which is a yeast I have never used before but I have high hopes for, time will tell I guess. From the reviews I have read, it ferments like a beast, allows slightly more malt flavour to come through and still also lets the hops shine, and importantly its drops brighter than WLP001.

Yeast propagation
Fermentation is extremely important when it comes to hoppy beers, a clean healthy fermentation is vital. For this the correct amount of healthy yeast must be pitched, and the use of yeast nutrients including zinc, and oxygen is vital. Below is my typical pitching rates and yeast propagation procedure.

First thing calculating yeast needed, the yeast calculator on Brewers Friend is my calculator of choice. As a general rule when using ale yeast I will pitch the following:

• OG up to 1.050: 0.75 billion cells / ml / deg plato
• OG 1.050 to 1.070: 1 billion cells / ml / deg plato
• OG 1.070 to 1.090: 1.25 billion cells / ml / deg plato
• OG 1.090 to 1.100: 1.50 billion cells / ml / deg plato
• OG above 1.100: as much as you can muster!

Then use the above pitching rates in the calculator to calculate the starter sized required, all starters should be well oxygenated prior to pitching the yeast, and yeast nutrient should be used. Propagate on the stir plate at a temp of 26-28degC and once fermentation activity stops, stop the stir plate as continued oxygenation will just deplete the yeast glycogen reserves and reduce viability and vitality of the yeast.

I would also avoid the used of cold crashing the yeast starter following propagation, the latest information shows that yeast which is cropped following cold crashing has a lower viability and vitality, if possible hold the starter at a temp of 13-15degC to aid flocculation and just give it another 24hours to drop.

Fermentation
Typically yeast is pitched into wort at 17degC and is then allowed to free rise in temp to 19 where it is held till fermentation is 2/3 complete at which point it is then raised to 20-21degC depending on the yeast.

I ferment all hoppy beers in conical fermenters and will do my best to ensure that a CO2 blanket is maintained at all times, once the yeast has been pitched oxygen and oxidation is the enemy!

Once the fermentation and dryhoping is complete all the beers will be cooled down to 1-2degC where it will be held for 5-7days, this is to try to drop the beer a bright as possible before bottling and kegging.

This is where I would like to change my process and will most likely be doing so over the coming few months. I would like to fit a spud valve to the fermenter and then use the last few points of the fermentation to pretty much carbonate the beer. I would also like to fine the beer in the fermenter using a vegan friendly finning agent.

This will then enable relatively bright carbonated beer to be bottled and kegged directly from the fermenter.

This then leads to the question is it worth using a product like to Brewers Clarex to deal with chill haze? For home brew – no, but if looking to sell the beer commercially may be yes not only does it remove chill haze but it also massively improves the stability of the beer, thus increasing shelf life.

Bottling
Even though all the beers will be bottle conditioned I will connect a beer gun to the fermenter, then excessively flush the bottles with CO2 before filling with beer. All the hoppy beers will be bottled to approximately 2.8 vols CO2, the DIPA will be re seeded with fresh yeast to ensure carbonation in the bottle.

The hope here is to minimise any DO pick up and any that does occur will be removed by the process of bottle conditioning – you can brew the best PA, IPA or DIPA and all that effort is then wasted by doing a bad job on the bottling.

The beers will then be kept at 20degC for 10days before being shipped off to the competition.

Then it’s up to the judges!

Cheers

Richard

Well time for an update – the hoppy beers did not medal but I did pick up a few prizes along with coming 3rd in the Championship brewer comp.

It seems that’s as the beer had to be brewed early and it also looks like I under carbonated a bit the beers just did not do very well – live and learn!

 

2 thoughts on “Brewing hoppy beers for LSE homebrew competition

  1. Excellent tips, thanks.

    Interesting point about not chilling yeast starter – makes sense.

    Also that you should stop stir-plate once fermentation activity stops. How would you suggest recognizing that point? Bubbles slowing / bubbles stopping / yeast attempting to clump on the bottom / wort changing colour / combination of all these? Or just measure gravity of it?

    My cloudwater blogpost inspired DIPA will hopefully be up against yours at the L&SE competition.

    • If your starter is on a stirplate and fermented at 26-28deg yeast growth will be complete is 12-24hours, the gravity should be down to terminal shortly after 24 hours, i then just look to see if the yeast is starting to clump, and if CO2 is still being evolved. I never take gravity readings till the yeast had dropped otherwise you lose too much starter volume unless your using a refractometer and a bit of software.

      I just dryhopped the DIPA – the first addition of 400g of hops! Next addition will go in on Friday morning. Pale ae is also tasting really good, the IPA is OK but I’m not getting excited yet!

      Cheers

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s