How can you prevent brownies from getting hard around the edges?

To prevent brownies from getting a hardened edge, follow these tips:

- Use a baking pan that is lined with parchment paper. This will help to prevent the brownies from sticking to the pan and make them easier to remove.

- Do not over-mix the batter. Over-mixing can cause the brownies to become dense and hard.

- Bake the brownies at the correct temperature. The ideal baking temperature for brownies is 350 degrees Fahrenheit (175 degrees Celsius).

- Do not over-bake the brownies. Over-baking can cause the brownies to become dry and hard.

- Let the brownies cool completely before cutting them. Cutting the brownies while they are still hot can cause them to crumble and fall apart.