I recently made a 16.5 gallon batch of Baltic Porter. I split it into three 5.5 gallon batches using 3 different yeasts. The mash and grain bill was the same for all. For the sake of experimentation I used ~26% specialty grains and mashed for 90 min at 158-159. The targeted FG was 1.020. Here is recipe info:
4 Munich Malt info
27 American 2-row info
6 American Caramel 80°L info
1.0 English Chocolate Malt info
0.5 American Roasted Barley
1 Belgian Special B info
1 Weyermann CaraMunich® II info
1 Oats Raw info
3 East Kent Goldings (Pellets, 5.00 %AA) boiled 60 min. info
1.5 Fuggle (Pellets, 4.75 %AA) boiled 30 min. info
0.5 Saaz (Pellets, 5.00 %AA) boiled 2 min. info
Yeast : Fermentis S04 batch 1 FG - 1.028
Danstar Nottingham Batch 2 FG = 1.025
Danstar Windsor Batch 2 FG - 1.032
All 3 fermented at 65F. Note: these fermentations were done.
Question 1: Is there any yeast that I can add to attenuate these down further or has my mash temp created so much unfermentable dextrines that I have what I have? I have some Champangne yeast on hand.
FWIW, the flavor on the Windsor batch is amazing. Going into this, I also knew attenuation would differ between these three yeasts and that Windsor was a medium to low attenuating yeast.
Question 2: In the future, should I keep this ratio of specialty to base malt and mash lower (say 154) or continue to mash high at 158 for full body and decrease the specialty content?
Lots of discussions about mash temps are highlighted on the board regarding high FG’s, but I believe there more to it such as the interaction of: ratio of specialty to base, yeast attenuation, as well as the mash temp.
Thoughts?
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