This is the recipe that got a honorable mention at the Bell's comp. It was derived from Adventures in Homebrewing's Buccaneer Baltic Porter. You can use lager yeast for a proper Baltic porter, but I prefer it with ale yeast.

Baltic Porter

Baltic Porter (12 C)

Type: All Grain
Batch Size: 5.50 gal
Boil Size: 6.90 gal
Boil Time: 30 min
End of Boil Vol: 6.35 gal
Final Bottling Vol: 5.00 gal
Fermentation: Quick Lager
Date: 02 Jun 2019
Brewer: j
Equipment: Dirty 30
Efficiency: 62.00 %
Est Mash Efficiency: 68.8 %

Ingredients

Amt	Name	Type	#	%/IBU
8 lbs	Pale Ale Malt 2-Row (Briess) (3.5 SRM)	Grain	1	50.8 %
3 lbs	Borlander Munich Malt (Briess) (10.0 SRM)	Grain	2	19.0 %
1 lbs 8.0 oz	Melanoiden Malt (20.0 SRM)	Grain	3	9.5 %
1 lbs 4.0 oz	Carafa II (412.0 SRM)	Grain	4	7.9 %
1 lbs 4.0 oz	Carafa III (Weyermann) (525.0 SRM)	Grain	5	7.9 %
8.0 oz	Caraamber (Weyermann) (36.0 SRM)	Grain	6	3.2 %
4.0 oz	Carafa I (Weyermann) (320.0 SRM)	Grain	7	1.6 %
1.25 oz	Northern Brewer [8.50 %] - Boil 30.0 min	Hop	8	23.9 IBUs
0.50 oz	Mt. Hood [6.00 %] - Boil 30.0 min	Hop	9	6.7 IBUs
0.50 Items	Whirlfloc Tablet (Boil 10.0 mins)	Fining	10	-
0.50 oz	Mt. Hood [6.00 %] - Boil 5.0 min	Hop	11	1.7 IBUs
2.0 pkg	Cultured Bell's Yeast [ale pitch rate]	Yeast	12	-