Preheat oven to 400°F.
Place bread cubes in a large bowl.
In a small bowl, whisk together olive oil, garlic powder, onion powder, Italian seasoning, oregano, salt, and pepper.
Pour over bread cubes and toss until evenly coated.
Spread onto a rimmed baking sheet in a single layer.
Bake 8–10 minutes, flipping halfway, until golden and crisp.
if using, toss with fresh chopped parsley
Cool completely before storing.