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August 15, 2018

Single Hop (Mosaic) Double IPA Homebrew Recipe

How to brew single hop mosaic double IPAHow big can you go with a single kettle, "brew in a bag" (BIAB) system? That's what we aimed to find out by brewing this beer. It's a double IPA that calls for a whopping 20 pounds of grain. The brewing process is a bit different for these types of beers, so if you're using a 10.5 gallon BIAB electric brewing system, pay close attention to the details below.

Brewing Water

We first added 8.6 gallons of tap water to our kettle and made some minor water chemistry adjustments. Next we removed about a gallon and a half of water. Some would argue that it's better to make chemistry adjustments based on the specific volume of water you plan to mash with. We weren't sure how much we were going to use so we just adjusted the full volume. It'll be good enough!


After heating the water to strike temp, we inserted the grain basket in our kettle and added the following grains to the grain basket:

  • Pale malt (16lbs 9.6oz)
  • Cara-Pils (12.8oz)
  • Caramel Malt(12.8oz)
  • Munich Malt (12.8oz)
  • Honey Malt (8oz)
  • White Wheat Malt (8oz)


We mashed at 150F for 60 mins, did a quick mashout at 170F for 10 minutes. After this we pulled the grain basket and placed it over the kettle using some basket hooks. We then sparged by pouring the water we took out at the beginning of the brew day through the grains in the suspended grain basket. Our pre-boil gravity was 1.067.

Boiling / Hops

  • We boiled for 60 minutes and added the following hops, etc:
  • Mosaic (2.0 oz) at 60 minutes (the start of the boil)
  • Whirlfloc Tablet (1) at 15 minutes (45 minutes into the boil)
  • Mosaic Hops (3.0 oz) at flameout (once we turned off the heat)


We added two packets of dry yeast (we did not make a starter) and planned to let it ferment at 67ish degrees Fahrenheit for 10 days. Actually, we let it sit for 2 months!!! Listen folks, it's summertime. We've been enjoying the nice weather doing a lot of day drinking. This one fell through the cracks.

Additional Benchmarks

Final Gravity: 1.012

ABV: 8.14%

Tasting Notes

This one isn't hoppy enough. First, it probably needed to be kegged and drank much sooner than it was. Second, it probably needs a dry hop addition. There really isn't any hop aroma to speak of. All in all, it's an OK double IPA, but not our best work. That said, please brew this one and tell us what you think! We'd love to hear about your version of the recipe.

  • Is this recipe for 10 gallons? I’m wanting to do a 5.5 Gal Brew and try a 1. Oz dry hop addition maybe more because I love mosaic

    Posted by Brewwookies on September 26, 2018

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