KBS (Kentucky Breakfast Stout) clone recipe
KBS — Kentucky Breakfast Stout — is Breakfast Stout aged in bourbon barrels for a year. Released annually in late winter to absolute frenzy. At 12% ABV with coffee, chocolate, oak, and bourbon, it's a cellar beer that famously improves with age, often hitting peak at 2-5 years.
About this beer
KBS is dessert in liquid form. Coffee and chocolate from the Breakfast Stout base, layered with vanilla, oak, caramel, and warming bourbon from the barrel aging. The bitterness is restrained for the gravity. At its best, KBS drinks like a great Kentucky bourbon's distant cousin — but it doesn't have to be drunk fresh. Cellar it for 1-3 years and the rough edges polish.
Grain bill (5-gallon batch)
| Grain | Weight | % | Role |
|---|---|---|---|
| 2-row pale malt | 17 lb | 65% | Massive grain bill for the 12% ABV. May need to do a high-efficiency mash or partigyle. |
| Flaked oats | 2.0 lb | 8% | Same oat percentage as Breakfast Stout. |
| Munich malt | 1.5 lb | 6% | Maltiness. |
| Caramel/Crystal 60L | 1.0 lb | 4% | Sweetness, body. |
| Chocolate malt | 1.75 lb | 7% | Bitter chocolate. |
| Roasted barley | 1.25 lb | 5% | Coffee bitterness. |
| Black malt (debittered) | 0.75 lb | 3% | Color, smooth. |
| Special B | 0.5 lb | 2% | Raisin, dark fruit. |
Hop schedule
| Hop | Amount | When | Purpose |
|---|---|---|---|
| Nugget | 1.5 oz | 60 min boil | Bittering |
| Willamette | 0.5 oz | 15 min boil | Background flavor |
Special ingredients
| Ingredient | Amount (5 gal) | Notes |
|---|---|---|
| Coffee (cold brewed) | 1 quart cold brew concentrate | Same approach as Breakfast Stout. |
| Cocoa nibs | 8 oz nibs soaked in bourbon for 2 weeks | The bourbon-soaked tincture is the bridge to the barrel character. |
| Bourbon barrel aging | 12 months in a fresh used bourbon barrel (5 gallon) | For homebrew scale, use 2 oz of medium-toasted American oak cubes soaked in bourbon for 4-6 weeks. Won't be identical but gets you in the ballpark. |
Yeast
Wyeast 1056 / Safale US-05
Standard American Ale yeast. May need to add fresh yeast at high gravity to ensure attenuation. Ferment at 66°F. Some brewers re-pitch fresh yeast after a week to finish the gravity.
Water profile
Same Breakfast Stout profile — moderate alkalinity to balance the dark malts.
Process notes
- Mash at 154°F for 90 min for full body and complete starch conversion at high gravity
- Boil 90 min minimum, possibly 120 min to concentrate
- Primary fermentation at 66°F for ~14 days
- After primary, transfer to secondary onto bourbon-oak cubes (4 oz medium-toasted American oak, soaked 4-6 weeks in bourbon, then added with the bourbon)
- Add coffee and cocoa nib tincture at this point as well
- Age in secondary 6-12 months, sampling monthly
- Bottle condition with fresh yeast and priming sugar — old beer needs new yeast to carbonate
- Drink window: 6 months to 5 years. Many KBS clones improve for 2-3 years.
Why it tastes like that
The interesting part of a clone recipe is understanding why each ingredient choice matters. Here's what each element of the recipe contributes:
- Bourbon barrel aging is the headline — fresh used bourbon barrels contribute vanilla, oak, caramel, and residual bourbon (often 1-2 oz of bourbon per gallon of beer absorbs into the wood).
- Extended aging allows the coffee and roast bitterness to integrate with the barrel character — KBS at one month old tastes harsh; at one year old it's polished.
- Higher coffee/cocoa ratio than Breakfast Stout — but the barrel character softens it.
- Special B malt adds raisin/dark fruit complexity that complements bourbon's dried-fruit notes.
- 12% ABV acts as a preservative and a solvent, allowing fat-soluble oak and bourbon compounds to extract more aggressively over time.
Sources & references
- Founders Brewing — KBS foundersbrewing.com