1. Start by making the pineapple coconut pudding. In a medium saucepan, combine the pineapple chunks, coconut milk, sugar, and cornstarch. Whisk everything together until smooth, ensuring there are no lumps from the cornstarch.
2. Place the saucepan over medium heat and cook, stirring constantly, until the mixture thickens and just begins to bubble. This usually takes about 5-7 minutes. You’ll want it to coat the back of a spoon—a clear sign it’s ready.
3. Remove the pudding from heat and stir in the vanilla extract. Pour it into small serving glasses or bowls and let it cool to room temperature before refrigerating. Chilling for at least 2 hours will help it set to a silky texture.
4. While the pudding chills, prepare the Piña Colada drink. In a blender, combine pineapple juice, cream of coconut, crushed ice, and rum (if using). Blend on high until smooth and frothy, about 30 seconds.
5. Taste the drink and adjust sweetness if needed by adding a little sugar or simple syrup. For a mocktail version, use coconut water instead of rum for a refreshing twist.
6. Serve the pudding cold with a spoonful of the frothy Piña Colada drink on the side, garnished with a pineapple wedge or toasted coconut flakes.

When I first developed this recipe, I remember testing it out during one of our “Wednesday dinners” in college—those budget-friendly gatherings where I tried to impress friends without breaking the bank. The pudding was a hit, and the drink brought a little vacation vibe to an otherwise ordinary evening. The key was getting the pudding just thick enough without turning gluey, a lesson I learned after my early kitchen experiments with balancing flavors and textures.