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Old 12-30-2009, 09:58 PM   #1
Dr_Gordon_Freeman
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Default So how did everyone's pumpkin or sweet potato ales turn out?

I am looking to find a good pumpkin or sweet potato ale recipe, and I guess now is the time to ask since you all have by now tasted your brews for the holiday. (I don't mind having mine late, I always love these flavors)

Keep in mind I am not a hop head, and what I am looking for is something that tastes kinda like pumpkin or sweet potato pie. My plan is to use the technique to aquire sweet potato syrup found in another thread:

Quote:
OCCURRENCE OF DIASTASE IN THE SWEET POTATO IN RELATION TO THE PREPARATION OF SWEET POTATO SYRUP
By HC Gore
From the Bureau of Chemistry United States Department of Agriculture Washington Received for publication July 18 1920
The manufacture of syrup from sweet potatoes by the use of malt has long been a matter of public record. 1 Directions for the small scale production of sweet potato malt syrup were issued by the Department of Agriculture in February 1919. The necessity for use of malt however apparently has prevented any wide use of the method. Further work on the production of the syrup has unexpectedly revealed the fact that the sweet potato is so rich in diastase that nearly all the starch becomes converted into soluble carbohydrates by autolysis upon slow cooking. Moreover the hot pulp formed by crushing the cooked sweet potatoes drains readily thus permitting the easy recovery of the sweet juices. Sweet potato syrup therefore can easily be made without the use of malt. The method consists simply in so heating the potatoes in the water that the tissues are heated at the temperature of maximum diastatic activity for from 10 to 20 minutes then heating to boiling in order to soften the tissues crushing and separating the sweet juices from the insoluble pulp The juice is then evaporated to syrup with or without further treatment. For example 1 kilo of Porto Rico potatoes was covered with water in an aluminum kettle placed over a Fletcher burner and the water heated to 60 deg C. The gas was then turned down and the heat applied very slowly so that the temperature gradually rose from 60 to 80 deg C during an hour and from 80 to the boiling point during the next hour. The boiling was continued for ½ hour when the potatoes were thoroughly soft. They were then mashed in the water in which they were cooked and enough water was added to form a thin pulp. The sweet juice in the pulp was then freed from the insoluble pulp ingredients by suction using a Buchner funnel and filter paper and the residue on the filter repeatedly exhausted with hot water. The filtrates were combined, evaporated to a thin syrup and weighed. The weight was 714 gm and the Brix reading at 20 C was 37.6. Thus 714 X 37.6 or 268.5 gm of syrup solids had been exhausted from 1 kilo of sweet potatoes The dried pulp weighed 59 gm. The syrup was finally evaporated to a solids content of about 75 percent. It was a slightly turbid amber colored liquid with a faint pleasant odor and a sweet taste with a slight flavor of the sweet potato. It contained a little soluble starch as shown by the iodine test but not enough to cause it to thicken upon standing. The sweet potatoes can be prepared for extraction by simply cooking them in water as in preparing for table use but the resulting syrup will contain enough soluble starch to cause it to thicken upon cooling and standing. Tests on the diastatic power of extracts of sweet potato and sweet potato flour were made by Lint ner's method as described by Brown 2

Sample -- Degrees Lintner

Porto Rico fresh pulp3 -- 300
Nancy Hall “ “ 3 -- 125
Porto Rico flour4 -- 500
Nancy Hall4 -- 300
Big Stem Jersey flour4 -- 160

SUMMARY
Sweet potatoes are high in diastatic power and it is possible to convert nearly all their starch into soluble carbohydrates by slowly cooking the potatoes in water. The pulp formed by mashing the cooked potatoes with hot water drains readily permitting the easy recovery of the sweet juice.

1 US Patent 109,991 was granted to Charles Delamarre on December 6 1870
2 Brown AJ Laboratory studies for brewing students New York 1904
3 Reduced to pulp in a Herles press Herles F 8th Internal Congr Appl Chem 1913 xxvi 5
4 Produced by shredding sweet potatoes with beet knives, drying in a rapid current of hot air grinding and bolting
Please post extract recipe with your review of your batch for this year!

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Old 12-30-2009, 10:17 PM   #2
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Are you extract only? I put together a mini-mash recipe, that turned out AMAZING.
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Old 12-30-2009, 10:27 PM   #3
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Grain steeping is certainly no problem, if that's what you mean by mini mash.
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Old 12-30-2009, 10:41 PM   #4
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this recipe came out ridiculously good:

Plumpkin Ale
Size: 5 gallons
Color: 29 HCU (~15 SRM)
Bitterness: 11 IBU
OG: 1.061 FG: -

1 lb. 8 oz. American victory
4 oz. Belgian CaraMunich
1 lb. British crystal 50-60L
Edit: Boiled 30 oz canned pumpkin for the entire 60 min (in a grain bag)

Boil:3 gallons
6 lb. Light malt extract
17 oz Maple syrup
late extract, half at 15
Hops:
1 oz. Kent Goldings (5% AA, 60 min.)

mix of 04 (dry) and 05 yeast (slurry from previous batch – half a liter maybe)
late extract, half at 15
Mash for 45 min at 155-145 – too much disparity – sparge with two cups hot water through grain bag.
3 gallons boil volume
whirlfloc at 10
one teaspoon of pumpkin pie spice at 5


OG – 1.060
FG– 1.011

added ¾ a teaspoon of spice to the priming sugar.

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Old 12-30-2009, 10:46 PM   #5
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I don't see any pumpkin in your recipe!?
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Old 12-30-2009, 10:53 PM   #6
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Quote:
Originally Posted by Dr_Gordon_Freeman View Post
I don't see any pumpkin in your recipe!?

fixed!!!!!
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Old 12-31-2009, 02:22 AM   #7
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thanks. any more people brew a delicious pumpkin ale?
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Old 12-31-2009, 02:25 AM   #8
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I'll let you know in a couple of weeks. Mine has been sitting in an ale pail since the middle of November, but I haven't gotten around to bottling it. Since my kegs are arriving next week, I'm just going to wait. By this time next month, I'll be pouring beer from newly installed taps in a new chest freezer turned kegerator. (Woo hoo! I hate bottling.)
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If you drink enough of it, it should come out very clear with just a tad bit of yellowish color.
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Old 12-31-2009, 02:45 PM   #9
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I did Nothern's Pumpkin Ale extract kit and I have been enjoying it very much, if I had to do it again I would add a bit more spice.

Now that it has aged you an taste the spice and pumpkin more, but still would say a 1 tsp additional on the spice. Your results may vary.
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Old 01-01-2010, 12:07 AM   #10
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I'm boiling sweet potatoes to extract the juice today. I'll let you guys know how it turns out.
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