Reserve some cherry juice and drain excess liquid from the pie filling before folding into batter to prevent a soggy cake; use reserved juice to brush the cooled cake for extra moisture and flavor.

Let butter and eggs sit at room temperature for 20 minutes before mixing; this helps the cake mix incorporate evenly and creates a lighter, more tender crumb structure.

Stir ingredients only until just combined to avoid developing gluten, which makes the cake dense and tough; aim for 15-20 gentle folds rather than vigorous mixing.

Add ½ teaspoon of cherry extract and 1 tablespoon of cocoa powder to the dry cake mix to deepen chocolate flavor and enhance the cherry notes without extra ingredients.

Allow the cake to cool in the pan for 15 minutes, then transfer to a wire rack for at least 2 hours; this sets the cherries in place and prevents the cake from breaking apart when sliced.