Castagnaccio (Tuscan Chestnut Cake)
50 min · 8 steps
Medium: 31–60 min or 7–12 steps
About this dish
A beautifully austere Tuscan flatbread-cake made with chestnut flour, rosemary-infused olive oil, pine nuts, and raisins. The batter rests before baking to fully hydrate the flour, producing a moist, fudgy interior beneath a cracked, golden, olive-oil-crisped crust. Naturally sweet, vegan, and utterly unforgettable.
Allergy Info
Tree Nuts
Diet Info
Vegan
Ingredients
Fresh Produce
- Fresh rosemaryleaves picked and roughly chopped2 sprigs
- Orangezested1 zest
Dried Goods
- Chestnut floursifted300 g
- Cold water400 ml
- Pine nuts50 g
- Raisinssoaked in warm water for 10 minutes and drained50 g
- Caster sugaroptional1 tbsp
Spices & Seasonings
- Fine sea salt1 pinch
Oils & Condiments
- Extra-virgin olive oil3 tbsp
- Extra-virgin olive oil, for infusing rosemary3 tbsp
- Extra-virgin olive oil, for the pan to taste
Utensils
- Large mixing bowl
- Small bowl
- Whisk
- Sieve / sifter
- 26–28 cm round cake tin or cast-iron skillet
- Pastry brush or paper towel (for oiling pan)
- Oven
Method
Combine the rosemary leaves with 3 tbsp olive oil in a small bowl and set aside to infuse while you prepare the batter.
Soak the raisins in warm water for 10 minutes, then drain and set aside.
Sift the chestnut flour into a large bowl with the salt and optional sugar. Gradually whisk in the cold water, starting with a small amount and adding more slowly, until you have a smooth, lump-free batter the consistency of thin cream. Stir in the orange zest and 3 tbsp olive oil.
Rest the batter uncovered at room temperature for 30 minutes to allow the chestnut flour to fully hydrate.
Preheat the oven to 220°C (200°C fan / 425°F). Generously oil a 26–28 cm round cake tin or cast-iron skillet with olive oil and pour in the rested batter — it should sit no deeper than 1 cm.
Scatter the drained raisins and pine nuts evenly over the surface, then drizzle the rosemary-infused oil over the top, letting the rosemary leaves fall across the batter.
Bake for 30–35 minutes until the surface is deeply cracked, the edges have pulled away from the tin, and the top feels set and dry to the touch — a few darker patches at the cracks are desirable, not a problem.
Remove from the oven and cool in the tin for at least 10 minutes before slicing. Serve warm or at room temperature, drizzled with a thin thread of your best olive oil.