Incredibly light, airy, and boasting a delicate melt-in-your-mouth interior, these fried sourdough treats leverage an advanced underwater stiff starter fermentation method to completely wash away harsh acidity. Enriched with whole milk, whole eggs, and softened butter, the dough proofs slowly overnight before hitting the hot oil, resulting in a perfectly puffed structure and a classic pale proofing ring around the center.
10:00 PM – Stiff Starter Initialization: In a small bowl, whisk 10g of your active starter culture into 30g of water. Add 60g of bread flour and mix thoroughly, kneading by hand until a smooth, tight ball forms.
The Submersion Bath: Roll the ball tightly into a cylinder. Place it into a tall glass jar filled completely with room-temperature water, ensuring the dough is entirely submerged. Let it sit at 74–78°F (23–26°C) overnight for 8 to 10 hours. As it ferments, the wild yeast fills the tight matrix with gas, causing it to float to the surface. By morning, the top layer will look slightly dry and the base will look soft; you will slice it open and harvest exactly 64g from the clean, airy center.
Day 2 – The Enriched Autolyse & High-Fat Emulsification
8:00 AM – The Dairy Autolyse: In your stand mixer bowl, combine 153g of whole milk, 50g of whole egg, 30g of granulated sugar, the 64g of harvested underwater stiff starter, and all 280g of bread flour (along with the optional 0.5g of dry yeast if using). Mix with a heavy spoon until a thick, shaggy mass forms. Cover and let rest for 30 minutes to complete the autolyse and activate gluten linkages.
8:30 AM – Developing Gluten: Secure the bowl onto your mixer fitted with the dough hook. Knead on low speed for 2 to 3 minutes (or KitchenAid speed 3 for 3 to 4 minutes) until uniform. Add the 5g of fine sea salt and mix for 2 more minutes until a cohesive ball forms.
Butter Emulsification: Turn the mixer up to medium speed and gradually introduce the 55g of softened unsalted butter piece by piece. Once all the butter is added, increase the speed and knead continuously for 10 to 15 minutes. The dough will look slippery at first but will eventually absorb the fat entirely, clearing cleanly from the sides of the bowl. *Note: If the dough remains persistently sticky or wet after 12 minutes, sprinkle in an additional 20 to 40g of bread flour to help it gather.*
9:00 AM – Warm Bulk Fermentation: Cover the bowl tightly and leave it to ferment at a warm 76–80°F (24–28°C) for 3 to 4 hours. During this window, execute 2 gentle rounds of stretch-and-folds spaced 1 hour apart to layer vertical strength into the dough. The dough should look visibly smoothed out and feel slightly puffy.
12:00 PM – Cold Fermentation Retard: Place the entire covered container directly into the refrigerator to chill the butter fats down for 8 to 10 hours.
Day 2 (Night) – Precision Punching & Overnight Proofing
10:00 PM – Rolling and Cutting: Remove the firm, cold dough from the refrigerator and tip it cleanly onto a lightly floured work surface. Using a rolling pin, roll the dough out to a uniform thickness of 1/2-inch.
Parchment Squares Setup: Cut out a dozen small individual squares of parchment paper. Using a flour-dusted doughnut cutter or a glass, punch out your rings. Place each punched doughnut cleanly onto its own separate parchment paper square. Collect the center holes and place them onto paper as well.
The Long Final Proof: Group the parchment squares onto a large baking sheet and cover them loosely with a large upside-down storage plastic bin or plastic wrap. Let them proof overnight on your counter for 8 to 10 hours at a room temperature of 72–73°F (22–23°C). By morning, they will have doubled in size, feeling exceptionally light, airy, and fragile. *Note: If your kitchen is hot (above 78°F/26°C), place them back in the fridge overnight instead and proof them on the counter the next morning for 2 to 3 hours.*
Day 3 – The Floating Fry & Silky Glazing
7:00 AM – Heating the Fat Matrix: Pour your frying oil into a heavy saucepan or deep pot until it reaches a depth of 2 inches. Clip on your thermometer and heat the oil over medium heat for 30 minutes until it stabilizes precisely between 350°F and 360°F (177°C–182°C).
The Seamless Fry Transfer: Pick up a doughnut by holding the corners of its individual parchment paper square. Gently lower the parchment and doughnut together directly into the hot oil. Within seconds, the dough will expand and float off the paper naturally; use tongs to lift the paper square out of the oil and discard it.
Buoyant Fry Timing: Fry the doughnuts for 1 to 2 minutes per side until they display a gorgeous, uniform golden-brown hue. You should see a distinct pale line running around the center equator where the buoyant doughnut sat above the oil. Use a slotted spoon or chopstick to transfer them onto a wire cooling rack. Fry the doughnut holes for about 60 seconds total, rolling them continuously.
8:00 AM – Preparing the Glazes: Choose your glaze option. In a medium bowl, whisk together your selected glaze ingredients until completely smooth, silky, and free of sugar crystals. *Note: If you prefer a thinner glaze, stir in an additional teaspoon of milk.*
The Finishing Dip: While the doughnuts are still warm, lower the top half or the entire doughnut directly into the glaze bowl. Lift it clear, letting the excess run off, and place it back on the wire rack for 5 minutes to let the glaze set into a beautiful matte skin. Serve fresh!
-**The Magic of the Underwater Stiff Starter:** Submerging a low-hydration (50%) sugary starter ball completely in water is a classic European sweet baking technique. The water environment creates an anaerobic barrier that severely limits the growth of acetic and lactic acid bacteria while allowing the wild yeasts to multiply steadily. This washes away sharp, sour, vinegary flavor notes, ensuring your doughnuts turn out sweet, buttery, and crowd-pleasing without any sourdough tang.-**Why the Parchment Squares are Critical:** A perfectly proofed sourdough doughnut is incredibly delicate and packed with fragile air pockets. If you try to pick it up with your bare hands to move it into the hot frying oil, your fingers will deflate the dough instantly, leading to dense, misshapen, flat rings. Proofing each doughnut on its own parchment square lets you slide the entire unit into the oil completely touch-free, locking in maximum fluffiness.-**Adjusting to Room Temperature Swings:** Enriched wild-yeast doughs are highly sensitive to ambient kitchen heat. If your house runs warmer than 75°F (24°C) overnight, leaving the doughnuts on the counter for 10 hours will overproof them, causing them to collapse and absorb oil like a sponge when fried. Always choose the refrigerator alternative if your environment is warm, allowing them to rise safely in a controlled environment before doing a quick 2-hour morning warm-up rise on the counter.-**Glazing Temperature Window:** For a flawless bakery finish, always dip your doughnuts while they are still notably warm to the touch. The residual heat from the dough thins out the powdered sugar matrix upon contact, allowing it to coat the rings in a razor-thin, glass-like layer that sets into a beautiful, crackly glaze rather than a thick, clumpy frosting.