PREP OVEN AND PAN: Preheat the oven to 350°F. Grease a 9 x 13-inch baking dish with 2 tablespoons unsalted butter or nonstick spray.
ADD FILLING: Pour both cans of cherry pie filling into the prepared baking dish. Use a rubber spatula to spread the filling evenly into the corners.
ADD CAKE MIX: Sprinkle the entire box of cake mix evenly over the cherry filling. Gently shake the pan to level the dry mix. Do not stir.
ADD BUTTER: Drizzle 10 tablespoons melted unsalted butter evenly over the cake mix. Try to cover as much of the dry mix as possible. Lightly shake the pan again to help distribute the butter.
BAKE: Bake for 45 to 50 minutes, until the top is golden brown and the cherry filling is bubbling around the edges. Start checking at 40 minutes.
COOL: Remove from the oven and let cool for 10 minutes before serving.
SERVE: Scoop into bowls and top with vanilla ice cream, whipped cream, or maraschino cherries if desired. Serve warm.
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Notes
Make-Ahead: This cake can be baked earlier in the day and reheated gently before serving.Storage: Store covered in the refrigerator for up to 4 days.Reheating: Reheat individual portions in the microwave for 20 to 30 seconds, or warm the full dish at 325°F until heated through.Freezing: Freeze cooled cake tightly covered for up to 2 months. Thaw overnight in the refrigerator before reheating.Butter Tip: If you see dry patches of cake mix after baking, drizzle a little extra melted butter over those spots next time for full coverage.