We think your baking instinct is probably right on — one of the most common reasons why cakes, cupcakes, and muffin sink in the center is because the butter and sugar mixture have been over-creamed. This can incorporate excess air, which then causes the structure to deflate after baking. Check out this video showing how to properly cream butter and sugar, and see if that makes your muffins look as pretty as they taste. Happy baking! Kye@KAF

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