Brewing with dextrose (corn sugar)

Discussion in 'Homebrewing' started by Abk542, Oct 30, 2015.

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  1. Abk542

    Abk542 Initiate (0) Sep 26, 2015 Michigan

    So I decided to do an experiment, I'm an extract Brewer and I wanted to substitute lme in my latest IPA recipe with corn sugar, as a cheaper ingredient. I used three pounds of light DME and 4 pounds of corn sugar. I have some concerns. After I topped of my wort with water in the fermentor I noticed that the liquids dos not mix. There was a significant difference in color. Perhaps the wort just needs a chance to combine. I'm curious if any extract Brewer has ever used a similar large amount of corn sugar and DME and whether or not they got good results. I'm relatively new to brewing maybe brewing with corn sugar was a dumb move who knows if so its a good learning experience. Anyways, Any input on the subject of using a large quantity of corn sugar in brews would be appreciated greatly.
     
  2. pinyin

    pinyin Savant (1,119) Sep 19, 2013 New York

    did you shake (oxygenate the fermenter)? what was your boil time and OG?
     
  3. Beerswimmer

    Beerswimmer Initiate (0) Mar 4, 2013 Texas

    The fermentation should erase all of your problems.
     
  4. PapaGoose03

    PapaGoose03 Grand High Pooh-Bah (6,057) May 30, 2005 Michigan
    BA4LYFE Society Pooh-Bah

    Once the fermentation gets started you should see a lot of churning thru the glass wall of your carboy. That churning will mix everything.
     
  5. Abk542

    Abk542 Initiate (0) Sep 26, 2015 Michigan

    Boil time was 60 minutes og was 1.080 or 90 something
     
  6. ChuckHardslab

    ChuckHardslab Maven (1,251) Jan 25, 2012 Texas

    The difference between malt extract and pure sugar is the sugar is going to ferment completely. You're probably going to end up with a pretty high ABV when all is said and done. I have no idea how that much sugar is going to effect flavor and mouthfeel.
     
  7. stealth

    stealth Pooh-Bah (2,023) Dec 16, 2011 Minnesota
    Pooh-Bah

    Sugar itself will not effect the flavor, assuming it all ferments out, but the increase in alcohol from 4 pounds of sugar vs. 3lbs of DME will. I can imagine it will be quite 'hot' and the malt flavor will be subdued behind the alcohol and hops. The alcohol, with only 3lbs of DME, will give you a pretty low (dry) final gravity.

    I brewed a hard root beer with a base that used 3lbs of DME with 2lbs of corn sugar and a pound of rice syrup solids and it dropped to 1.001. Very dry and very flavorless (which was my goal). Not what you would want for an IPA, really.
     
  8. pweis909

    pweis909 Grand Pooh-Bah (3,250) Aug 13, 2005 Wisconsin
    Pooh-Bah

    Too much corn sugar subbing and your body suffers. Your fermentation may be more prone to generating fusel alcohols, too.
     
  9. Abk542

    Abk542 Initiate (0) Sep 26, 2015 Michigan

    After letting it sit overnight nothing has happened there is still a dostinct difference in color almost as if the wort and water have separated completely. There is also no airlock activity and the yeast appears to be floating on top I took another gravity reading and this time put my siphon lower in the fermentor to try and get a reading on the wort that has settled in the bottom. The reading was astronomical I've never seen a hydrometer float that high. I'm not quite sure what to do. I obviously wouldn't mind a high abv beer but I don't think it will have any abv if the yeast can't reach the sugars
     
  10. GUNSLINGER

    GUNSLINGER Initiate (0) Nov 18, 2013 Colorado

    I would expect a beer with little body, lots of alcohol and some cidery flavors.

    When n too much corn sugar is used in place of DME or LME- you get a cidery kind of flavor going on.

    Let us know how it turns out.
     
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  11. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    Yeast have been fermenting sugars for a long time. Don't worry, they'll find them.
     
  12. Brew_Betty

    Brew_Betty Initiate (0) Jan 5, 2015 Wisconsin

    You used way too much sugar for any style of beer. An IPA can use 0%-10% sugar. Some Belgian styles use 20%-30% sugar. I'm not aware of any style that uses 60% dextrose.

    It's possible you might like the end result, but this won't be your best beer.
     
    MrOH likes this.
  13. CurtFromHershey

    CurtFromHershey Initiate (0) Oct 4, 2012 Minnesota

    That would be the IPH - India Prison Hooch
     
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  14. wspscott

    wspscott Pooh-Bah (1,958) May 25, 2006 Kentucky
    Pooh-Bah

    What yeast did you use? What temperature did you pitch at? What temp is the room at where the beer is?
     
  15. ssam

    ssam Pundit (997) Dec 2, 2008 California

    You have to mix after you add top off water. Otherwise, as you've seen, you'll end up with stratification. It's happened to me. Next time mix it so it's all even before you pitch. I don't think this has to do with the sugar, just the not mixing.
     
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  16. Abk542

    Abk542 Initiate (0) Sep 26, 2015 Michigan

    I used safale 05 yeast I pitched at 68 degrees F and store it at around the same temperature. Over the last few hours the beer seems to have mixed it's a much better looking color throughout however I'm still seeing no airlock activity or krausen forming.
     
  17. DrMindbender

    DrMindbender Initiate (0) Jul 13, 2014 South Carolina

    I did the exact same 4 lbs corn sugar + 3 lbs DME on 2 IPA batches years ago...the end results was not that good. My wife will drink any IPA and she refused to drink it because it was way too sweet. Even though corn sugar completely ferments out, it still leaves a residual sweetness that reminds me of a bad adjunct lager...kind of like how a mead still has the characteristics of honey even though it all ferments out. It took me forever to drink those batches and now I never go over 1lb in a bigger beer to dry it out or 8 oz in a typical 6% IPA. I'm sure your beer will get going if you did things right.

    Unless you did this as a partial mash, 3 lbs DME + 4 lbs corn sugar doesn't come close to an OG of 1.080-1.090 for a 5 gallon batch. You can use an online calculator like this one... http://www.brewersfriend.com/homebrew/recipe/calculator/ ... to calculate expected brew stats. When you used your hydrometer to measure that 1.080-1.090, there was a lack of mixing of the wort that gave you an off OG.
     
    #17 DrMindbender, Oct 31, 2015
    Last edited: Oct 31, 2015
  18. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    I don't know where the sweetness came from, but assuming fermentation didn't poop out, it wasn't from anything residual (left over) from the corn sugar. Corn sugar is nothing but dextrose (glucose), plus a small amount of water. Yeast turn all of the glucose ultimately into alcohol and CO2. The reason mead tastes like honey is that honey does not completely ferment. Only the sugars in honey do. The hundreds of other compounds in honey don't.
     
  19. wspscott

    wspscott Pooh-Bah (1,958) May 25, 2006 Kentucky
    Pooh-Bah

    Don't worry about bubbles in the airlock, it is possible that CO2 is leaking out from around the stopper. Since you did not pitch too hot, you definitely have live yeast in the beer, it just is taking time to get going. RDWHAH
     
  20. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    Another thought... I wonder if the higher concentration of dextrose vs. maltose led to higher ester formation, which could have been perceived as sweetness.
     
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