- Preheat oven to 350°F.
- Add pineapple tidbits with juices to a 9×13-inch baking dish and spread into an even layer.
Pour sweetened condensed milk evenly over pineapple.
- Sprinkle cake mix over condensed milk.
- Arrange butter slices over cake mix. Sprinkle maraschino cherries evenly over butter.
- Bake for 45-50 minutes until the top is bubbly. Allow to cool slightly and serve warm.
- Tip: For a delicious addition, serve warm pineapple dump cake with a scoop of vanilla ice cream.