|Image from Brewery Web Site|
The official web site describes the beer as having a "complex taste with hints of caramel, roasted malt and coffee in combination with the creamy hazel head." Wine yeast is used in secondary fermentation. They also list the following details:
- 10.5% alcohol
- 23 degrees Plato (which works out to a gravity of 1.096 SG)
In Draft magazine, I found that the IBU rating for Gulden Draak is reported to be 18 IBUs.
The beer I brewed that contained the flavor which reminded me of Gulden Draak (a Trappistes Rochefort 10 clone attempt) contained:
- Belgian Pilsen Malt
- Belgian Caramunich Malt
- Melanoidin Malt
- Special B Malt
- Carapils/Dextrine Malt
- Chocolate Malt
- D-180 Candi Syrup
The other beer had hints of a Gulden Draak flavor in the background, with a dark chocolate note up front that I don't get from Gulden Draak. I decided that I would start my clone attempt by using that Trappistes Rochefort 10 clone recipe, dropping the Chocolate malt entirely, increasing the Special B malt, and adding more candi syrup. These changes, I hoped, would mostly eliminate the chocolate flavor and radically dial up the prune/raisin/plum flavors.
6.75 pounds Belgian Pilsen Malt
0.75 pounds Belgian Cara 45 Malt
0.50 pounds Melanoidin Malt
0.75 pounds Special B Malt
0.25 pounds Carapils/Dextrine Malt
2.00 pounds D-180 Candi Syrup
1.00 pounds D-90 Candi Syrup
0.50 ounces Styrian Goldings hops @ 6.3% AA (60 min.)
0.70 ounces Hallertau Mittelfruh @ 4.0% AA (10 min.)
0.25 teaspoons Yeast Nutrient
0.25 tablets Whirlfloc
Mangrove Jack's Belgian Strong Dark Ale Yeast
Everything but the yeast and candi syrup went into the Zymatic.
|Grain and hops loaded into the Zymatic step filter|
- Original Gravity: 1.089 SG
- Final Gravity: 1.022 SG
- SRM: 31
- ABV: 8.6%
- IBU: 24
- Starting Water: 3.36 gallons (I used 3 gallons, 1 quart, plus a half quart)
- Batch Size: 2.5 gallons
- High Efficiency Step Mash used, unmodified
With the candi syrup added, the numbers changed to:
- Original Gravity: 1.107 SG
- Final Gravity: 1.027 SG
- IBU: 21
- SRM: 89
- ABV: 10.4%
Since this recipe stretched the 9 pound grain limit of the Zymatic, I chose not to add the candi syrup during the brew. I was also concerned that if the syrup was present from mash through the entire boil step, it might alter or diminish the flavors provided by the syrup.
The brew went more or less perfectly other than the fact that parts of the grain bed seemed merely steamed rather than mashed. I suppose that's what happens when you tax the Zymatic's grain limit.
When I extracted the finished wort to chill it with my immersion chiller, I first stirred in the syrup. Then I used the immersion chiller to finish cooling it off. After that, the gravity registered 25 Brix or 1.109 SG (after adjustment) instead of the gravity I expected, 1.107 SG. The color of the beer also got dramatically darker, more of a black than a reddish brown.
Given ambient basement temperatures this time of year, cooling should not be necessary (though heating might be). The Tripel I'd made the day before had never gone above 67F during the height of fermentation.
Post-Mortem and Other Notes
I started with the Trappistes Rochefort 10 clone recipe. That beer had a hint of Gulden Draak flavor to it, but was thinner, drier, and had a strong chocolate note. I removed the chocolate malt from it, tripled the dark candi sugar, and increased the Special B malt. All of these should amp up the dark fruit flavor. I won't know, of course, until the yeast finishes its job. That may take a few weeks.
Thus concludes my last brew of 2017.
01/02/2018: The beer has been fermenting nicely. It pretty much started several hours after the yeast was pitched. The ambient basement temperature was keeping it on the low side, so I wrapped the fermenter with a heat wrap and some foam insulation to bump up the temperature, which accelerated the fermentation somewhat. It will probably finish primary fermentation around Monday 1/8.
01/04/2018: The airlock isn't showing active fermentation at this point, so it must be approaching the end of primary fermentation. A sample pulled from the fermenter had a reddish brown color similar to a real Gulden Draak ale. It's still pretty sweet at this point, which isn't surprising - given both the original beer's sweetness and the fact that the yeast may still have work to do.
01/27/2018: I bottled the beer today using 3 ounces of corn sugar. Yield was roughly 27 bottles. It has a good aroma and flavor, even warm and flat, so I'm hopeful it will be a good beer when it's finished carbonating - whether it clones Gulden Draak or not. I expect to do my first taste test around 02/10/2018.