Here’s the funny part—brownies don’t usually go bad from sitting out; they just get stale. After a day, the edges get chewy, and the center turns into a dry, crumbly brick. That’s not dangerous—it’s just sad.
Want to keep them fudgy? Wrap them tightly in plastic wrap or stash them in an airtight container. Without that, moisture escapes into the air, and your brownies transform into something better suited for a geology class.
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The “Fridge or Counter” Debate
Should you refrigerate them? Only if you want a denser, firmer texture—or if you live in a sweltering kitchen (above 90°F). Otherwise, the fridge will dry them out faster than a desert wind.
Pro tip: If you’re worried about a three-hour window, just reheat them in the microwave for 10 seconds. The heat will eliminate any surface microbes and restore that just-baked soul.