Sourdough

This Year's Hot Cross Buns Should Be Sourdough

And chocolate, too.

March 30, 2021
Photo by Maurizio Leo

The Perfect Loaf is a column from software engineer turned bread expert (and Food52's Resident Bread Baker) Maurizio Leo. Maurizio is here to show us all things naturally leavened, enriched, yeast-risen, you name it—basically, every vehicle to slather on a lot of butter. Today, he tells us how to turn classic hot cross buns into tender, slightly tangy, chocolatey hot cross buns.


At the right time of year and in the right location, you can smell hot cross buns—leavened sweet buns spiked with spices and dried fruit—before even making it inside a bakery. Usually topped with a sweet glaze and a white cross of flour and water, hot cross buns pop up around Easter and are most commonly associated with their place of origin, the United Kingdom. Admittedly, I have never seen them grace a pastry case out here in the southwestern U.S., but I recall seeing their bright white crosses in bakeries during my travels through Europe in years past.

It’s safe to say I’m happy to have rediscovered these beautiful buns lately, because when baked well, they are hard to resist. They have all the right components for a festive treat: sweetness from the sugar in the dough, dried fruit, and simple syrup glaze; spice from the cinnamon, nutmeg, and allspice; and a tender texture and richness from the butter and egg. For me, a good hot cross bun has the spice of an oatmeal cookie, the texture of a soft dinner roll, and the sweetness of a cinnamon bun.

Typically, hot cross buns are leavened with commercial yeast, which gives them their tall rise and light interior. My approach to these—of course—is 100 percent naturally leavened, using a sourdough starter.

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Top Comment:
“Usually the dried fruits are soaked and plumped up with water or juice - will this disturb the hydration level of the dough? I don't have chocolate chips on hand, and would love to give this recipe a try, with dried fruits. Thanks!”
— CC
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But first, let’s take a look at what else sourdough does when making hot cross buns.

What does sourdough bring to hot cross buns?

While I might be biased, I think sourdough always carries a welcome depth of flavor that isn’t generally found in recipes that rely on commercial yeast and require a shorter rise time. The lengthy fermentation time needed for sourdough starter (or a starter-based levain) to acidify and make dough rise produces organic acids: the longer the fermentation time, the greater the acidity—and complexity of flavor.

The acid by-products of lengthy natural fermentation indeed make for a more delicious bun, contributing to the dough’s tender interior and helping awaken the palate to other flavors in the treat—I like to think of it like adding vinegar to a salad or a splash of lemon juice to steamed vegetables. For a bonus, the acids also lend nutritional benefits, namely by helping to break down the dough’s gluten, which makes it more digestible, improves glycemic response, and helps unlock nutrients in the grain for better absorption by our bodies.

Challenges with sourdough in hot cross buns

Converting a yeasted product to be 100 percent naturally leavened can bring challenges. In this case, the dough has a relatively high sugar percentage, which can inhibit fermentation activity. Sugar, being hygroscopic, robs yeast cells of the water necessary for fermentation. Having a little sugar in a dough can help spur fermentation as a kind of "fuel" (you may know this if you’ve added a pinch of sugar to a bowl of warm water or milk and commercial yeast), but as the sugar percentage in a dough increases, the fermentation activity decreases. If you’ve ever baked sourdough cinnamon rolls or another heavily enriched dough, you’ll know just how sluggish it can be—sometimes requiring several hours more rise time than a leaner dough (one with no butter, sugar, or eggs).

Why doesn’t commercial yeast have this problem? Compared to natural leavening, typical instant yeast doesn’t suffer from this because it’s created to be resilient even in the face of high sugar concentrations. This type of leavener is what you’ll typically found in pastry applications and other enriched doughs. But this doesn’t mean we can’t use sourdough for sweet baked goods; we just need a few adjustments.


How to make sourdough hot cross buns

The first step to making hot cross buns is to swap out the commercial yeast with a sourdough starter; but to further dial things in, we can make a dedicated levain specifically for these buns. Making a dedicated levain helps skew the ratio of bacteria to yeast in the desired direction. In this case, we’re looking for increased yeast activity (for a strong rise) and decreased bacterial activity (to reduce sourness—great in sourdough bread, not as desirable in hot cross buns).

Let’s take a look at the three things I focused on when developing my sourdough hot cross bun recipe: Ensure fermentation activity is vigorous by increasing preferment percentage, increasing fermentation time, and reducing excessive acidity. Let's break it down.

Increasing preferment percentage

When baking with commercial yeast, you might only need around 1 percent yeast to total flour in the mix. But with natural leavening, which is not quite as potent, we need a large preferment—which in the case of sourdough is our sourdough starter or levain—to ensure vigorous fermentation from the start and to avoid excessively long fermentation times. Typically, with a sourdough bread recipe (without any sugar in the dough), my preferment percentages are around 15 to 20 percent, but because this hot cross bun dough has a high percentage of sugar to total flour (8 percent), I increased the levain percentage to 37.14 percent.

By increasing the preferment percentage, we start with a higher bacteria and yeast population. This increase means from the beginning, there will be more “workers” helping to ferment the dough, speeding up the timeline to ensure the dough is fully fermented by the time it goes in the oven.

Increasing fermentation time

Despite the increased preferment for this recipe, it’s also necessary to increase the fermentation time. Since we’re using natural leavening instead of extremely potent commercial yeast (which isn’t affected by sugar in the dough), it takes longer. But this is a good thing! A longer-running fermentation time ensures the bacteria has enough time to do its work, creating the organic acids that add flavor and aid digestion.

Reducing excessive acidity

While some acidity is a flavor boost, excessive amounts—especially in a sweet application like these buns—can be overpowering and detract from the eating experience. To keep acidity low, I first settled on using all white flour (instead of whole-wheat flour)—in this case, higher-protein bread flour. Not only will this flour ensure a tall rise and fluffy texture, but white flour also has less bran and germ present from the wheat berry, which helps limit the sour flavor in these buns. The bran and germ act to buffer the dough’s total acidity during fermentation, allowing bacteria to function for much longer before their activity begins to wane (bacterial activity decreases as pH decreases): The longer bacteria functions, the more acidity in the final baked product.

To further reduce acidity in the dough, I add a small amount of sugar to the levain, limiting bacterial cell count while it’s ripening. Most bacteria are negatively affected by sugar, so adding a small amount to the levain skews the levain to be more yeast-dominant, reducing the final dough’s total acidity.

Now we’re on our way toward a hot cross bun with classic texture and a slight sourness that keeps luring you back, bite after bite. This brings me to one more adaptation:

Photo by Maurizio Leo

Swap the dried fruit for chocolate—if you dare

Traditionally, hot cross buns are loaded with dried fruit, typically raisins, cranberries, apples, or even a mix. In my take, instead of the dried fruit, I use chocolate to bring additional sweetness—and a little bitterness—which pairs wonderfully with the added spices (cinnamon, nutmeg, and allspice) and orange and lemon zests. While chocolate might not be a traditional addition to these hot cross buns, after trying it, I wouldn’t have them any other way.

Will you change up your hot cross bun routine this year and try this recipe? Let us know in the comments!

See what other Food52 readers are saying.

  • CC
    CC
  • Patti Curfman
    Patti Curfman
  • Smaug
    Smaug
  • Maurizio Leo
    Maurizio Leo
  • Lilika Change
    Lilika Change
Maurizio is the software engineer-turned-baker behind the award-winning sourdough website, The Perfect Loaf. He grew up in an Italian household and spent many summers in the back kitchen of his family's Italian restaurant, learning the beauty of San Marzano tomatoes and the importance of well-proofed pizza dough. He went on to get a master's degree in computer science and co-create the stargazing app, SkyView, before eventually circling back to food and discovering the deep craft of baking sourdough bread. Since that first loaf of bread, he's been obsessed with adjusting the balance between yeast and bacteria, tinkering with dough strength and hydration, and exploring everything sourdough.

10 Comments

CC March 31, 2021
Will the dough formula work for dried fruits too? Usually the dried fruits are soaked and plumped up with water or juice - will this disturb the hydration level of the dough? I don't have chocolate chips on hand, and would love to give this recipe a try, with dried fruits. Thanks!
 
Author Comment
Maurizio L. March 31, 2021
That will work as well! I made these with soaked currants and raisins and it came out splendid. Happy baking!
 
Lilika C. April 5, 2021
What stage did you add your soaked dried fruits?,as I cant see any actual recipie would be more helpful🤣
 
Author Comment
Maurizio L. April 6, 2021
Here's the recipe:
https://food52.com/recipes/85374-sourdough-hot-cross-buns-with-chocolate-chips-recipe
 
Patti C. March 30, 2021
Formula?
 
CC March 31, 2021
The link to the recipe is embedded in the 2nd para to "How To Make Sourdough Hot Cross Buns" in the article. Hope you'll find it!
 
Author Comment
Maurizio L. March 31, 2021
https://food52.com/recipes/85374-sourdough-hot-cross-buns-with-chocolate-chips-recipe

Hope you like them, Patti!
 
Smaug March 30, 2021
I would contend that commercial yeast produces just as "natural" a fermentation as sourdough starter. It's a naturally occurring species living its life in a normal way. A friend of mine would have preferred the term "acoustic" (as opposed to electric), but somehow his usage failed to catch on.
 
Author Comment
Maurizio L. March 30, 2021
It's natural, indeed, but a little more processing to get it into your kitchen. Nothing wrong with commercial yeast at all, to each their own, and they each have their use! I might say 'internal combustion engine' vs. 'electric' car — you choose which is which!
 
Smaug March 31, 2021
Well, my friend (and I) are guitarists- for a natural automobile, I'd go with those things they drove in the Flintstones.