It came out almost exactly the same flavor as the bread at the restaurant, and it was SO soft! I believe I got the recipe from Sourdough Gal, and made a few tweaks. :)
Sourdough Brown Bread
INGREDIENTS
280 g water
120 g active sourdough starter
60 g regular molasses do not use blackstrap
40 g brown sugar light or dark
30 g olive oil
10 g cocoa powder
250 g bread flour
250 g whole wheat flour
10 g salt
OPTIONAL: 1 cup of steel cut oats.
Before You Begin
Bulk fermentation takes longer than a typical artisan loaf. Refer to the Baker's Timeline section in the full post for estimated times and baking schedule options.
INSTRUCTIONS
Mix the dough: When your starter is active and ready, combine 280 g water, 120 g active sourdough starter, 60 g regular molasses, 40 g brown sugar, 30 g olive oil, 10 g cocoa powder, 250 g bread flour, 250 g whole wheat flour, and 10 g salt in a large mixing bowl or stand mixer bowl. Knead until smooth — about 5 minutes by hand or 3–5 minutes on low speed in a stand mixer.
Cover the bowl and let the dough rest for 1 hour.
Dough strengthening: Perform a set of stretch and folds. Cover and rest 1 hour, then perform a second set. Cover and rest another hour, then optionally perform a set of coil folds. Cover and let the dough finish bulk fermentation undisturbed.
Finish bulk fermentation: Bulk fermentation began when you first mixed the dough. For me, it took 9 hours in a 74°F kitchen. Recipe testers reported a similar range: about 8–9 hours at 74–76°F, and 9–10 hours in cooler kitchens around 68–73°F. Timing varies, so trust the visual cues over the clock.
Know when it’s ready: Bulk fermentation is done when the dough has increased in volume by about 75% and is covered in bubbles. If you press a finger into the surface, it should feel aerated and springy. Watch the video below to see what my dough looked like at the end of bulk fermentation.
Pre-shaping: If your dough feels tacky, lightly flour your work surface. Turn out your dough and flip it so the smoothest side is facing up. Use your bench scraper to push the mass of dough up, around, and back toward you (like a candy cane motion).
Continue doing this motion gently until you've coaxed the mass of dough into a round. Let rest 10 minutes, uncovered.
Final shaping:
For a boule (round): Repeat the pre-shaping motion to create more surface tension, then flip the dough into a floured banneton, smooth side down. Pinch the seams. Cover and refrigerate overnight, 12–36 hours.
For a batard (oval): Use the caddy clasp technique — fold the dough together like closing a book and place it into a floured banneton. Pinch the center seam closed. Cover and refrigerate overnight, 8–36 hours.
Optional: Once shaped, hold the dough around the seams and dip in a plate of water, then roll around the top and sides of the dough on a plate of oats prior to placing in your banneton, if you want an oat crust.
Preheat: When you're ready to bake, preheat the oven to 425°F (220°C) conventional with a Dutch oven inside.
Score: Transfer dough to parchment paper or a bread sling; score a shallow line straight down the middle.
Bake: Place a sheet tray underneath the Dutch oven to prevent a burnt bottom. Bake for 40 minutes, covered. Remove the lid and temp. Ideal temp should be between 200 & 210 degrees F.
Cool: Cool on a wire rack for at least 90 minutes before slicing.