Preheat Oven – Set to 350°F (175°C). Grease a 9x13-inch baking dish or line it with parchment paper.
Mix Ingredients – In a large bowl, combine the dry cake mix with the entire can of crushed pineapple (juice included). Stir until smooth.
Bake – Pour the batter into the prepared pan and bake for 25-30 minutes, or until a toothpick inserted comes out clean.
Cool & Serve – Let the cake cool before slicing. Optionally, top with whipped cream, coconut flakes, or a dusting of powdered sugar.
