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Melancholy and the Infinite Pumpkin Ale

29/7/2014

2 Comments

 

Inspiration strikes

Cleaning the kitchen is my job and I do a fine job - most nights. One particular clean-up following a family get-together over a roast dinner I was scrubbing at the baking dish and marveling at how the amber colour from the roast pumpkin (which had caramelised and crusted onto the edges of the dish) continued to run into the dishwater. I started thinking about beer and wondered if I could utilise the colour from the caramelised roast pumpkin in a pumpkin ale.
Now, we Aussies can be forgiven for hearing "pumpkin" and "beer" in the same sentence and thinking that to be a strange concept, but I assure you, the yanks have been brewing pumpkin ale for many years.

The giant pumpkin fermenter

Now, I don't quite recall how I stumbled across this page , but somewhat bemused at this bloke's commitment to utilising his giant pumpkins in his beer, I shared the page with my friends - and my wife, who tends to love these kind of off-beat ideas and often succeeds in motivating me to try them - as is exactly what happened in this case.  

I tried to combat her promptings with excuses like "where am I going to get a pumpkin that size?", but as it happened, she'd recently made a friend who happened to have grown giant pumpkins and had no plans for them other than to feed them to their pigs. 

So, we took a drive out to Longford and collected one (thanks Ed & Christine).

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The Recipe

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It seems that most folks who brew a pumpkin ale are looking to introduce the pumpkin pie flavours and spices. I was after more of a roast pumpkin experience, such as the pumpkin from the roast meal that particular afternoon. I decided the beer should take the form of an amber ale, representing roast pumpkin in colour. The beer would be malt-driven with enough bittering from the hops to bring balance and perhaps a faint aroma, but the pumpkin should be the star.

93% Base malt
5% Caramel 120L malt
2% Roasted Rye
0.8 g/L 15% Ella at 60 mins
0.56 g/L 8% Challenger at 10 mins

The procedure

I gutted the pumpkin (ensuring I cut a neat 'lid') into a large baking dish and added a couple of generous tablespoons of brown sugar to help with the caramalisation. With the 18L of mash sitting on 66C, the guts went in the oven at 180C.

About midway through the course of the 60 min mash I checked on the guts in the oven and was astonished to find it looking more like soup that baked pumpkin. It needed reducing - fast. A dished half into a saucepan and put it on a burner, and leaving the other half in the oven I made sure I opened the oven door regularly. 

At the 60 min mark, the pumpkin was about perfect. The reduction was a sticky, seedy caramel - ready for addition to the boil.
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I ladled a few spoons of wort into  the baking dish and started rubbing at the caramelised goodness with the a spoon. All the colour started leeching out into the wort - just as it did in the sink several afternoons before :) The caramel-pumpkin enriched wort was (carefully) poured back into the pot.

The fermentation

Contrary to my usual method, the wort was added to the pumpkin HOT to assist in removing any harmful bacteria which may have been present in the pumpkin. It took a full 24 hours in a cold room to drop to an acceptable 22C - the pumpkin flesh proved a pretty good thermal insulator! I pitched Denny's Favourite 50 - a second generation, as I'd harvested some from my previous brew (a big fat brown ale). OG 1.054 (from memory).
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Finishing up

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Denny's Favourite had finished its slow work within around 10 days, finishing quite high (1.018). I'd put this down to some additional fibre picked up from the fleshy fermenter.

I spent quite sometime in a huge hardware store looking for the right plumbing to install a tap into the pumpkin prior to this project, but alas, walked out empty-handed. So, the messy task of siphoning the brew into a secondary fermenter began.

The secondary was left to cold crash before bottling. As you can see from the picture, the end result wasn't so cloudy for a thick ale :-) Although this pic doesn't do it justice, the brew developed an excellent thick, finely-bubbled head with excellent retention.
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2 Comments
Clifton Shipway
30/7/2014 08:28:38 am

If there is one thing I like it's a big thick head...

Reply
Laura Hou link
11/9/2017 05:57:03 pm

Never heard that a pumpkin could pay a role in beer brewing.. It is fist time for me to hear that. And thank you for sharing the instructions. Maybe we will have a try the next time. Fresh and Interesting!

By the way, this is Laura from Jinan Tiantai Company, we are a beer equipment manufacturer in China. We also brew beer by ourselves with a 1000L system, but not very professional. And welcome to visit our web if you have any interest: http://www.craftbreweryequipment.com/

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    Author

    Andrew Swift is an enthusiast of original beer and original music. Long-time drummer, teacher and a more-recent father of three, Andrew is now taking up the challenge of brewing on his own commercial brewhouse, launched Jan 2015.

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