How long do the Brownie Mix last after baking? Should they be refrigerated to last longer?

Jonno Rushbrook Updated by Jonno Rushbrook

SuperFat Keto Brownies are best consumed within four days after baking. After that, it's best to throw them in the fridge.

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Can I make the SuperFat Keto Brownie mix in muffins tins instead of brownie pans?

What are the additional ingredients required for SuperFat Keto Brownie?