Creating Rosemary Croissant Croutons is simple if you follow these steps:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C).
2. Prepare the Croissants: Cut the croissants into bite-sized cubes. Aim for uniform pieces for even cooking.
3. Mix the Seasoning: In a large bowl, whisk together the olive oil, chopped rosemary, garlic powder, salt, and black pepper.
4. Combine: Add the croissant cubes to the bowl with the seasoning. Toss gently until all pieces are coated evenly.
5. Spread on Baking Sheet: Arrange the seasoned croissant cubes in a single layer on a baking sheet lined with parchment paper.
6. Bake: Place the baking sheet in the preheated oven and bake for 15-20 minutes, or until the croutons are golden brown and crispy. Stir halfway through to promote even browning.
7. Cool: Remove from the oven and let them cool completely on the baking sheet. They will continue to crisp up as they cool.
8. Optional Garnish: If desired, sprinkle grated Parmesan cheese over the warm croutons for extra flavor.

These steps will guide you in creating delicious Rosemary Croissant Croutons that are sure to impress!