- Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper.
- Place bread cubes in a large mixing bowl. Toss with the olive oil, garlic powder, grated parmesan, salt and cracked black pepper and toss until evenly coated.
- Spread bread cubes on the prepared baking sheet in a single layer.
- Bake 12–15 minutes, tossing halfway through, until golden brown and crisp.
- Cool slightly before serving — they will crisp more as they cool.
Storage: Store cooled croutons in an airtight container at room temperature for up to 3 days. Re-crisp in the oven if needed.