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Belgian Quadrupel, version 1.1

Back in January, I brewed my first Belgian Quadrupel.  It turned out so well that I have only 4-5 bottles of it left, and that's only because I've been jealously guarding them.  I decided to brew it again today, and also to change it up a little to see if I could improve on it.


12 pounds of Belgian Pilsen malt
12 ounces of Caramunich I malt
8 ounces of Melanoidin malt
5 ounces of Special B malt
4 ounces of Aromatic malt
1 ounce of Chocolate malt
2 pounds of Iraqi Date Syrup
4 ounces of Turbinado Sugar
4 ounces of D-90 Candi Syrup
0.25 ounces of Indian Coriander seeds, crushed
5 grams of Grains of Paradise, crushed
0.85 ounces of Styrian Goldings hops pellets @ 6.2% AA
0.65 ounces of Northern Brewer hops pellets @ 10.1% AA
0.50 ounces of Czech Saaz hops pellets @ 3.4% AA
0.5 teaspoons of Wyeast Yeast Nutrient
1 Whirlfloc tablet
1 tablespoon of pH 5.2 Stabilizer
1 Wyeast 1214 Belgian Abbey yeast smack-pack

Changes Since Version 1.0 of the Recipe

Version 1.0 of this recipe turned out to be one of the best beers I'd ever brewed.  My friends, my wife, and I happily went through most of it within a few weeks of bottling.  The beer was slightly sweet, had a nice raisin/plum flavor, and a great aroma of spice and fruit.  Despite being over 9% alcohol, it was a very easy to drink beer.

This time around I made several changes:
  • Pilsen malt was dropped from 12.5 pounds to 12 pounds, and 8 ounces of Melanoidin malt were added.  This was done in the hope that it would improve head retention in the beer relative to version 1.0.
  • Special B was increased from 4 ounces to 5 ounces, because I had an extra crushed ounce of Special B left and just wanted to use it up.
  • Turbinado sugar was dropped from 8 ounces to 4 ounces.
  • D-90 syrup was dropped from 16 ounces to 4 ounces.
  • Brewer's Crystals were left out - I'd only added them last time to hit my target gravity.
  • The 4 ounces of raisins were eliminated.
  • In place of the reduced Turbinado, D-90, and raisins, I used a two-pound jar of Iraqui Date Syrup I'd purchased at Jungle Jim's earlier.  My hope was that this would provide a good substitute for the raisin flavor in version 1.0.  Since I didn't want the percentage of adjuncts to exceed 15% for this version, I dialed back the D-90 and Turbinado so that the total worked out to approximately 15%.
  • This time around I had fresh yeast (dated less than a month before brew day)

BeerSmith 2 provides the following estimated characteristics for the beer:
  • Estimated Original Gravity:  1.092 or 21.8 Brix
    (version 1.0 of the recipe was 1.090)
  • Bitterness (IBUs): 31.2
    (version 1.0 was 29.7)
  • Color: 22.3 SRM
    (version 1.0 was 19.2)
  • Est. ABV: 10.6%
    (version 1.0 was 9.5% estimated and 9.3% actual)
  • Estimated Pre-boil Gravity: 1.078 or 18.7 Brix
After brewing, the following characteristics were measured:
  • Actual ABV at end of fermentation:  11.3%
  • Actual Final Gravity: 1.010 (hydrometer measured)
  • Final volume: 4.75 gallons

Equipment Profile

The beer was prepared in The Grainfather, then transferred to an SS Brewing Technologies Brewmaster Bucket fermenter.  The fermenter was equipped with a fermwrap heater and Cool Zone cooling jacket, with an Inkbird temperature controller, inside an insulated bag.  Cold water for the Cool Zone jacket is provided by a mini-refrigerator with a plastic water-filled bin inside it.

The Mash

5.5 gallons of tap water were placed into The Grainfather's kettle.  Part of a Campden tablet was dropped in to neutralize chlorine and chloramine, while the the kettle heated the water to 152F.

When the water reached the desired temperature, grain was gradually scooped and stirred into it until the entire grain bill was in the kettle.  At that point, the perforated lid and overflow tube were installed, the glass lid placed over the kettle, the recirculation tube installed, and the pump switched on.

Mashing was done for 120 minutes at 152F.

After mashing, the kettle temperature was raised to 170F and held there for 10 minutes.  The grain basket was lifted out and began to drain.  2 gallons of sparge water were heated in a separate vessel during the end of the mash process and gravity-transferred into the grain basket to sparge it.

Resulting kettle volume was around 6.5 gallons.  Pre-boil gravity was 16 Brix on the refractometer.

The Boil

The wort was brought to a boil, with a 90-minute boil schedule.

For the first 30 minutes, the wort boiled without any hops.  Unlike the previous batch, I didn't use any Fermcap to prevent boil-over, but instead stayed there until the foaming stopped on its own, stirring the kettle as needed.

After 30 minutes of the 90-minute boil, The Northern Brewer and Styrian Goldings hops were added in a hop spider and bag.

At 15 minutes left in the boil, the yeast nutrient and Whirlfloc tablet were added.

At 10 minutes left, the date syrup, Turbinado sugar, and D-90 syrup were added.

At about 7 minutes left, I began circulating boiling wort through the counter flow chiller to sterilize it.

At 5 minutes left, I added the coriander and grains of paradise.

At 3 minutes left, I added the Czech Saaz hops for aroma and slight flavor addition.

When the boil was finished, the pump was switched off, the heating element switched off, the hose out of the counter flow chiller moved to a sanitized fermenter, cold water turned on for the chiller, and the pump reactivated.  Chilled wort began flowing into the fermenter.

Due to the relatively warm weather and tap water, the counter flow chiller only brought the wort down to about 80F.  The recipe called for the yeast to be pitched at 72F, so I moved the fermenter to my fermentation temperature control system and switched it on.  The system began chilling the fermenter from 80F down to 72F.  A while later the target temperature was reached.

The finished wort had the following characteristics:

  • Pre-boil gravity:  17.5 (vs. BeerSmith estimated 18.7 Brix) but volume was about 6.5 gallons
  • Original gravity: 1.090 (vs. BeerSmith estimated 1.092), the same as version 1.0
  • Finished volume in fermenter:  5.5 gallons vs. estimated 5 gallons
My brewhouse efficiency on this one was estimated by BeerSmith to be 81.5%.  Not bad.

The Fermentation

The yeast was pitched at 72F and the fermenter sealed up in its temperature control apparatus.

The plan is for the beer to remain in the fermenter for 3 weeks before being transferred to a secondary fermenter.  It will spend 1 week in secondary before being bottled.

On June 26, 2016, it should go into secondary.  On July 3, it should go into bottles.

That will make it ready for consumption somewhere around July 17, 2016.

I'll be back to add more notes and a final gravity reading when I'm ready to bottle it.

Bottling Day (July 2, 2016)

Due to a lot of non-brewing activity on the home front, I never transferred the beer to a secondary fermenter, so it's remained in the primary since the day it was brewed.

A sample measured with a hydrometer registered a final gravity of 1.010.  Given the starting gravity of 1.090, the Brewer's Friend ABV calculator (output shown at right) says this beer reached 11.3% ABV and achieved 88% attenuation.  That's much better than I got from the last batch and higher attenuation than I expected.

The sample in the hydrometer had a nice coppery brown color typical for a quad.  The fermenter had a fruity bubble-gum-like aroma to it, implying that the Belgian yeast had done its work well.

I boiled 164 grams of D-90 candi syrup for five minutes to provide the priming sugar for the beer.  According to the Candi Syrup, Inc., web site, this should get me a CO2 volume around 2.7-2.8. I'd have gone higher, but they claim that many bottles will burst at 2.8 and above.

In addition to the D-90, I rehydrated a packet of Red Star Champagne yeast to provide a fresh yeast for carbonation.

Most of my bottles ran through the dishwasher and were then soaked in Star San before use.  Some received only a rinse and Star San treatment.  I wanted to know if cleaning the bottles in the dishwasher improved beer flavor and head retention at all, so I labeled each bottle accordingly.

I've also found in some cases that I'm not giving my beer enough priming sugar, which may be why some of them haven't carbonated properly.  In addition to the D-90, I added 1-6 small size carbonation tablets to some of the bottles and labeled them accordingly.  For this reason, I'm actually expecting to have some "bottle bombs" this time around.  I placed all the bottles, whether primed with just D-90, or a mix of D-90 and drops, inside plastic bins with clip-on lids.  If they burst, they should make a mess inside the bin but not elsewhere.

Post-Mortem and Tasting Notes

July 9, 2016:  Since I bottled this beer with champagne yeast and (in several bottles) extra sugar, I wondered if it might be decently carbonated after only a single week.  I put a bottle in the refrigerator today and let it chill for a few hours.  Examining the closed plastic bin in which the bottles are conditioning, I saw that none of the bottles had burst yet.  That was a good sign as far as I was concerned.


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