Combine active-dry-yeast, warm water, and a pinch of sugar in your mixing bowl. Stir and let it sit 5–10 minutes until foamy. This activates the yeast and ensures it's alive.

Look for a bubbly, foamy surface. If it doesn't foam after 10 minutes, toss it and start with fresh yeast—your yeast may be expired.

Add flour, 2 tbsp (30 ml) olive oil, and salt to the yeast mixture.

Mix with a spatula until you get a shaggy dough. All flour should be hydrated.

Switch to your hands and kneading for 5–7 minutes until smooth and slightly elastic. The gluten will develop as you work the dough. You can also use the stretch-and-fold technique if you prefer a gentler approach.

Drizzle a little olive oil over the dough and turn to coat. Cover the bowl with a damp towel or plastic wrap.

Let it proofing at room temperature for 60–90 minutes, until doubled in size. Use the poke-test to check readiness—the dough should spring back slowly.

Drizzle 2-3 tablespoons of olive oil into your 9×13 inch pan and spread it around. Don't be shy—the oil creates the crispy bottom.

Gently transfer the dough to the pan. Press and stretch gently toward the corners. Don't worry if it springs back.

If the dough resists stretching, cover and let it rest 15 minutes. The gluten will relax and make shaping easier.

Oil your fingertips and press deep dimples across the entire surface. Go all the way to the bottom of the pan—these pockets collect oil and create flavor.

Drizzle the remaining 1 tbsp (15 ml) olive oil over the top, letting it pool in the dimples.

Sprinkle chopped rosemary and flaky-salt generously. The salt should be visible—it's part of the presentation.

Let the dough rise uncovered for 30 minutes. This allows the surface to dry slightly for better browning and lets the oil settle into those dimples.

During this time, preheat your oven to 425°F (220°C). A fully preheated oven is essential for proper rise.

Ensure oven is fully preheated to 425°F (220°C). A hot oven is essential for oven-spring.

Bake 20–25 minutes until golden on top and the bottom sounds hollow when tapped. Internal temperature should reach 200-205°F (93-96°C).

Let cool in pan for 10 minutes before transferring to a cooling-rack. This lets steam escape and prevents sogginess.

Place a large cast iron skillet in the oven while preheating.

Carefully place your focaccia pan inside the hot cast iron skillet.

Bake 20-25 minutes. The cast iron transfers extra heat to the bottom for superior crunch.