Finish the following sentence with the best choice: How long to bake your Nutella brownie?

Choices:
- Preheat the oven to 350 degrees. Bake for about 10 minutes. Stick a toothpick in the center and bake until the toothpick comes up clean.
- Preheat the oven to 350 degrees. Bake for about 20 minutes. Stick a toothpick in the center and bake until the toothpick comes up clean.

Answer:
Preheat the oven to 350 degrees. Bake for about 20 minutes. Stick a toothpick in the center and bake until the toothpick comes up clean.