All Antico Vinaio Bread Recipe: Sweet Potato and Walnut Swirls in One Bake

This All'Antico Vinaio bread recipe brings a taste of Rome's most famous bakery to your kitchen with its signature sweet potato and walnut swirls. The secret lies in a simple yet precise dough made with just flour, water, olive oil, and yeast—no fancy ingredients, just time and patience.

I've perfected this rustic technique over years of baking, and the results are worth every minute of waiting.

The magic happens during the slow fermentation, which develops deep flavor and creates that iconic crispy crust with an airy, open crumb. We'll shape the dough into a classic loaf, then bake it until golden brown.

The sweet potato and walnut filling adds a delicious contrast to the bread's rustic simplicity, making each bite unforgettable.

What you'll end up with is a loaf that rivals the original from Rome's historic bakery—crispy on the outside, tender on the inside, with pockets of sweet potato and walnut swirls throughout.

This bread is perfect for serving alongside soups, salads, or simply enjoying on its own with a good olive oil drizzle.

The beauty of this recipe is its simplicity—just a few ingredients and one bake, yet the results are restaurant-quality. Whether you're a seasoned baker or just starting, this method delivers consistent, impressive results every time. Let's get started on creating your perfect loaf.

Ingredients for all antico vinaio bread

Simple ingredients, slow fermentation, and one bake create Rome's legendary sweet potato-walnut bread.

The flour is your foundation—King Arthur or Caputo Tipo 00 if you want to splurge, but good all-purpose works fine. Yeast matters here: check expiration dates—old yeast won't activate properly. The sweet potato should be orange-fleshed, starchy varieties like Jewel or Garnet. Roast it whole until tender (about 45 minutes at 400°F), then mash it smooth. Walnuts? Toast them first—2 minutes in a dry pan—so they release their rich flavor. I grab mine from Trader Joe's in bulk, but any store's walnuts will do.

No sweet potato? Mashed pumpkin or butternut squash works in a pinch, but the flavor won't be identical. Short on walnuts? Pecans or hazelnuts add nice texture. The cinnamon is totally optional, but it pairs beautifully with the sweet potato. If you're making this ahead, prep the filling first—mix the mashed sweet potato with walnuts, cinnamon, and a pinch of salt. Store it in the fridge for up to 3 days before shaping the dough. The yeast needs to be warm water-activated—if it's too hot, it kills the yeast; too cold, it won't wake up. Test with your finger: should feel like bathwater.

This dough needs time to rise—plan for at least 2 hours total. Keep it in a lightly oiled bowl covered with a damp towel in a warm spot. The filling can be prepped 1 day ahead and stored in the fridge. For the bake, preheat your oven to 425°F with a Dutch oven inside for 30 minutes—this creates steam for that perfect crust. The bread keeps well at room temperature for 2 days wrapped in a towel, or freeze up to 3 months for freshness. Slice it thick—each bite is worth it.

Step-by-step instructions for sweet potato and walnut swirl bread

Here's how to create that perfect Antico Vinaio-inspired loaf with rich swirls.

Peel and boil the sweet potatoes until fork-tender, about 15-20 minutes. Drain well and mash them until completely smooth—no lumps should remain. Stir in the 1 cup toasted walnuts and 0.5 teaspoon cinnamon until evenly distributed. Set aside to cool completely before using.

This filling gives the bread its signature sweetness and texture contrast. If the mixture feels too thick, add 1 teaspoon of warm water to help it spread easily during assembly. The walnuts should be toasted first—just spread them on a baking sheet and toast in a 350°F oven for 8-10 minutes until fragrant and lightly golden.

In a large bowl, whisk together the 1.5 cups warm water (between 105-115°F), 1 tablespoon granulated sugar, and 0.25 ounce active dry yeast. Let it sit for 5-10 minutes until foamy. This step ensures your yeast is active and ready to work.

Add the 5 cups all-purpose flour and 1.5 teaspoons salt to the yeast mixture. Stir with a wooden spoon until a shaggy dough forms. Then gradually drizzle in the 0.75 cup extra-virgin olive oil while mixing. The dough should come together but still feel slightly sticky—this is normal for a wet dough like this.

Turn the dough onto a lightly floured surface and knead for about 5 minutes until smooth and elastic. You'll know it's ready when it springs back slowly when poked. If the dough feels too sticky, wet your hands slightly as you knead—this helps prevent tearing.

Divide the dough into two equal portions. Roll each portion into a rectangle about 12x8 inches. Spread half of the sweet potato-walnut mixture evenly over one rectangle, leaving a 1-inch border around the edges. Fold the other rectangle over the filling to create a sealed packet.

Roll the sealed packet into a log shape and pinch the seam to seal. Then carefully braid the dough into a classic Antico Vinaio style—three equal strands twisted together. Place the braid on a baking sheet dusted with 0.25 cup cornmeal and cover with a damp towel. Let it rise in a warm place for 1-1.5 hours until nearly doubled in size.

While the bread rises, preheat your oven to 375°F. The dough should puff up noticeably and feel light when pressed gently. If it doesn't rise well, your yeast might not have been active enough—this is why we checked for foam earlier. Sprinkle the risen loaf with 1 tablespoon coarse sea salt just before baking.

Bake the bread for 35-40 minutes until the crust is deep golden brown and sounds hollow when tapped on the bottom. The internal temperature should reach 190-200°F. Rotate the baking sheet halfway through for even browning.

Let the bread cool on a wire rack for at least 30 minutes before slicing—this prevents the walnut filling from oozing out. The aroma as it bakes will fill your kitchen with warm, sweet, nutty goodness. Each slice should reveal those beautiful swirls of sweet potato and walnut throughout the crumb.

Dietary considerations for these flavors

Gluten-Free Adaptation

For a gluten-free version, replace the 5 cups all-purpose flour with a 1:1 gluten-free flour blend like Bob's Red Mill or King Arthur. You'll need about 5 cups total, but these blends can be slightly less absorbent, so add 2-3 tablespoons of extra water to the dough mixture.

Let the dough rest for 10 extra minutes before shaping to help the blend hydrate properly. 🌾

Vegan Option

Skip the yeast and use 2 tablespoons nutritional yeast mixed with 1 tablespoon sugar for activation. Replace the extra-virgin olive oil with avocado oil (neutral flavor) and add 1 teaspoon apple cider vinegar to the dough for tang.

The sweet potato-walnut filling remains the same, but ensure your walnuts are 100% plant-based (no honey or dairy additives).

Lower Sugar Version

Reduce the 1 tablespoon granulated sugar in the yeast mixture to ½ teaspoon and skip the cinnamon entirely. For the filling, use ½ cup unsweetened applesauce mixed with the 1.5 cups mashed sweet potato to balance sweetness. This keeps the bread flavorful without added sugar. 🍠

Nut-Free Substitute

Replace the 1 cup walnuts with 1 cup toasted pumpkin seeds (pepitas) or ½ cup sunflower seeds for a nut-free option. Toast the seeds in the same way—8-10 minutes at 350°F—for maximum flavor. The texture will be slightly different but still add a satisfying crunch to the bread.

Allergen-Friendly Tips

For egg-free baking, no adjustments are needed—this recipe doesn’t require eggs. If avoiding dairy, ensure your olive oil is 100% pure (no butterfat additives). For soy-free diets, check your yeast packet—some brands use soy-based additives. Always verify ingredient labels, especially for gluten-free blends, which may contain trace allergens.

Frequently asked questions