When baking cakes, one of the most frustrating issues is a sunken center, which often ruins the texture and appearance. From my own baking experiments, I've found that even with the same cake batter, variations in bake time and pan size can dramatically affect whether a cake sinks or bakes evenly. Overbaking a cake or baking it at too high a temperature can cause the cake to rise quickly and then collapse as the structure weakens. Conversely, underbaking leaves the cake center too moist and unable to hold itself up. Adjusting baking time closely according to your pan size is key; larger pans require longer bake times, while smaller pans need shorter bakes to prevent overcooking the edges. Pan size affects heat distribution as well. A thick or dark pan will absorb heat more intensely, potentially causing the crust to set too fast while the inside remains uncooked, contributing to sinking. Using light-colored metal pans or glass pans with adjusted times helps maintain even baking. Additionally, I’ve noticed that the cake batter’s aeration level matters. Overmixing introduces excess air, which can cause it to rise rapidly and then collapse. Under-mixing, however, results in dense structure. Achieving a balance and following precise measuring instructions helps prevent sinking. In summary, focusing on proper bake time tailored to your pan size, monitoring oven temperature, and carefully mixing the batter ensures your cakes bake evenly without sinking. Patience and attention to these factors transform your baking results from disappointing to delightful.