Kettle carmalization would be the only thing I could think of. What are you brewing?
This is figured at 105 mins, starting with 7.5 gallons.
GrainFather IPA
21-A American IPA
Size: 6.19*gal
Efficiency: 75.0%
Attenuation: 83.0%
Calories: 196.43*kcal per 12.0*fl oz
Original Gravity: 1.060 (1.056 - 1.070)
Terminal Gravity: 1.010 (1.008 - 1.014)
Color: 12.87*SRM (6.0 - 14.0)
Alcohol: 6.5% (5.5% - 7.5%)
Bitterness: 61.0 (40.0 - 70.0)
Ingredients:
12.0*lb (85.7%) Pale Ale Malt - added during mash
1*lb (7.1%) Crystal Malt 60°L - added during mash
1*lb (7.1%) Cara-Pils® Malt - added during mash
1*oz (25.0%) Columbus 12.9% (12.9%) - added during boil, boiled 60*m
1*oz (25.0%) Simcoe® (13.0%) - added during boil, boiled 20*m
1*oz (25.0%) Centennial (9.0%) - added during boil
1*oz (25.0%) Simcoe® (13.0%) - added dry to primary fermenter
Notes
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Results generated by BeerTools Pro 2.0.14