The best container for storing brownies to keep them fresh is an airtight plastic or glass container.
Airtight plastic containers with a proper seal will well at maintaining the freshness of the brownies and keeping the brownies moist.
And airtight glass containers are also excellent for keeping brownies moist and fresh and glass containers that are airtight also tend to keep the brownies moist longer than plastic containers.
For baking brownies, a metal pan, especially aluminum baking pan of the size of 8x8 or 9x9 inch square pan is best for baking brownies as the metal pan conducts heat evenly for perfect and fudgy textured brownies.
The best baking pans for brownies are the Chicago Metallic Professional Brownie Pan, the Fat Daddio's Square Cake Pan and the All Clad Pro Release Nonstick Square Baking Pan.
The Chicago Metallic Professional Brownie Pan has dividers that are great for consistent, edge only pieces of brownies.
The Fat Daddio's Square Cake Pan is a top choice for an aluminum baking pan for baking brownies as it heats up quickly.
And the All Clad pro Release Nonstick Square Baking Pan is best overall for baking brownies as it cooks the brownies evenly and is easy to cleanup.
Before you remove or cut the brownies from the baking pan, you should always allow the brownies to cool completely even before you place the brownies in a container to prevent sogginess due to condensation and use parchment paper to line the baking pan for the brownies to ensure easy removal of the brownies and quick and easy cleaning and store the brownies at room temperature to keep the brownies soft and fudgy.