If The Bottoms Of Your Cakes Come Out Dense, Check These 2 Things - Tasting Table
Briefly

The process of cake baking involves not only adhering to recipe instructions but also developing an intuitive sense for adjustments based on visual cues. Observing the texture of the cake can indicate issues such as uneven baking, which may necessitate preheating the oven and checking temperature calibration with an oven thermometer. The material of the baking pan also significantly affects results, with aluminum yielding better consistency than glass. Additionally, mixing techniques, including the speed and method of creaming, play a crucial role in achieving the desired cake texture.
If you're not already preheating your oven, be sure to do so, as this has been known to cause issues with a cake's consistency.
Using a suboptimal baking pan can lead to uneven baking; aluminum pans conduct heat well whereas glass takes longer to heat up.
Read at Tasting Table
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