01 -
Combine mature sourdough starter, sugar, water and flour into a shaggy mass. Cover and rest in a warm spot for 1 hour.
02 -
Incorporate salt and olive oil into the dough. Mix thoroughly using a scrunching/pinching motion, pressing with fingers and folding until fully combined.
03 -
Transfer dough to a covered container and let rise in a warm location for approximately 1.5 hours. Perform stretch and folds every 30 minutes, forming a square shape. Alternative method: use coil folding technique.
04 -
Place dough on a well-oiled baking sheet or parchment-lined tray. Allow to rest at room temperature in a warm spot for 3-4 hours until bubbly and naturally spread. If using 10-inch cake pans, divide dough in half (500g each) and gently transfer to pans. Alternative option: refrigerate overnight (or up to 3 days) loosely covered with oiled plastic wrap.
05 -
Preheat oven to 230°C (450°F) with a baking stone or steel positioned in the center if available. Dimple the focaccia surface deeply by pressing fingers through the dough repeatedly across the entire surface.
06 -
Drizzle olive oil generously over the dimpled surface. Sprinkle with coarse salt and rosemary or preferred toppings.
07 -
Bake on the stone or steel for approximately 20 minutes until golden with a crispy bottom. If not using a stone/steel, position the focaccia in the bottom third of the oven to ensure proper base crispness.
08 -
Remove from oven and immediately drizzle with additional olive oil. Allow to cool slightly before slicing.