This optimized blueprint relies on olive oil and a precise 350 degree Fahrenheit bake to create predictably shatteringly crisp sourdough croutons that hold up against any dressing.
The one-inch cube size is non-negotiable for consistent results, as smaller cubes scorch and larger cubes remain chewy. For the best flavor payoff, use a high quality, fresh extra virgin olive oil. If your croutons lose their crunch during storage, you can crisp them back up in a 300 degree oven for 5 minutes. If you live in a high humidity environment, the storage life may be slightly shorter; consume within four to five days for peak flavor, as oils can oxidize slightly after seven days.