– sourdough starter – olive oil – parmesan cheese – salt
Pour the mixture on a baking tray lined with parchment paper. Try to spread it very thin, as this is what will make the crackers crispy.
Put the tray in the preheated oven for 8 minutes at 345°F (approx. 175°C). After 8 minutes, take it out and cut the crackers with a pizza cutter or a sharp knife.
Bake the crackers for an additional 20 minutes at 345°F (approx. 175°C). You can even go a minute or two longer if you want a crispier, golden brown result.