A pound cake sinking in the middle can happen for several reasons:u003cbr/u003eu003cbr/u003eu003cstrongu003eIncorrect oven temperature:u003c/strongu003e If the oven temperature is too low, the cake may not cook evenly, causing it to sink in the middle. Make sure your oven is calibrated correctly, and check the temperature with a thermometer.u003cbr/u003eu003cbr/u003eu003cstrongu003eOver-mixing:u003c/strongu003e If the batter is over-mixed, it can cause the cake to collapse in the middle. Be sure to mix the ingredients just until they are combined.u003cbr/u003eu003cbr/u003eu003cstrongu003eOpening the oven door:u003c/strongu003e Opening the oven door too frequently or too early in the baking process can cause the cake to sink. The sudden change in temperature can cause the cake to collapse.u003cbr/u003eu003cbr/u003eu003cstrongu003eUnderbaking: u003c/strongu003eIf the cake is not baked long enough, the center may not be fully set and can collapse.u003cbr/u003eu003cbr/u003eTo prevent your pound cake from sinking in the middle, follow the recipe carefully and ensure that your oven temperature is accurate. Avoid over-mixing the batter, opening the oven door too early or too frequently, and underbaking the cake.