Imagine a warm, golden casserole bubbling with the sweet scent of sun‑kissed pineapple, creamy coconut, and a hint of caramelized brown sugar. This is the Tropical Delight Pineapple Casserole—a comforting treat that brings a slice of island paradise straight to your kitchen.
What sets this dish apart is the marriage of bright tropical fruit with a buttery, oat‑laden topping that crisps beautifully in the oven. The subtle splash of vanilla and a whisper of rum elevate the flavors without overpowering the natural sweetness of the pineapple.
Anyone who craves a cozy dessert with a tropical twist will fall in love—kids, busy families, or guests looking for something different at a potluck. It shines as a after‑dinner sweet, a weekend brunch centerpiece, or a festive holiday indulgence.
The recipe is straightforward: toss pineapple and coconut in a sweet sauce, layer with an oat‑butter crumble, and bake until bubbling and golden. In under an hour you’ll have a dish that looks as inviting as it tastes.
Why You'll Love This Recipe
Bright Tropical Flavors: Fresh pineapple paired with coconut milk creates a lively, island‑inspired taste that instantly transports you to a beachside hammock.
One‑Dish Simplicity: All components assemble in a single casserole dish, minimizing cleanup while delivering a layered texture of creamy interior and crisp topping.
Family‑Friendly Sweetness: The balanced sweetness satisfies both kids and adults, and the optional rum adds depth for those who enjoy a grown‑up twist.
Versatile Serving Options: Serve warm with vanilla ice cream, chilled with whipped cream, or simply on its own for a comforting dessert any time of day.
Ingredients
The magic of this casserole begins with the freshest ingredients you can find. Juicy pineapple provides natural sweetness and a burst of acidity, while coconut milk adds a silky richness that ties everything together. A blend of oats, butter, and brown sugar creates a crunchy, caramelized topping that contrasts the soft fruit beneath. A few pantry staples—vanilla, cinnamon, and a splash of rum—round out the flavor profile, making each bite feel both familiar and exotic.
Main Ingredients
- 3 cups fresh pineapple chunks
- 1 cup shredded sweetened coconut
- 1/2 cup unsalted butter, melted
Wet Mix
- 1 cup coconut milk (full‑fat)
- 1/3 cup dark brown sugar
- 1 teaspoon vanilla extract
- 2 tablespoons dark rum (optional)
Dry Mix & Topping
- 1 cup rolled oats
- 1/2 cup all‑purpose flour
- 1/4 cup light brown sugar
- 1/2 teaspoon ground cinnamon
- Pinch of ground nutmeg
- 1/4 cup sliced toasted almonds (optional)
Together, these ingredients create a harmony of textures and flavors. The pineapple’s natural juices mingle with coconut milk and brown sugar, forming a luscious sauce that seeps into every bite. Meanwhile, the oat‑butter crumble turns golden and crisp, delivering a satisfying crunch that contrasts the tender fruit. The optional rum adds a subtle depth, while the toasted almonds contribute an extra layer of nutty richness.
Step-by-Step Instructions

Preparing the Fruit & Sauce
Start by preheating your oven to 350°F (175°C). While the oven warms, toss the pineapple chunks with coconut milk, dark brown sugar, vanilla, and rum in a large mixing bowl. Stir until the sugar dissolves and the pineapple is evenly coated; this mixture will become the fragrant, caramel‑laden base of the casserole.
Making the Crunchy Topping
In a separate bowl, combine rolled oats, flour, light brown sugar, cinnamon, nutmeg, and toasted almonds. Drizzle the melted butter over the dry ingredients and use your fingertips to rub everything together until the mixture resembles coarse crumbs. The butter coats each particle, ensuring a buttery, golden crust when baked.
Assembling the Casserole
Spread the pineapple‑coconut mixture evenly in a 9‑x‑13‑inch baking dish. Sprinkle the oat topping uniformly over the fruit, pressing lightly so it adheres. The layered appearance should show a bright yellow base topped with a speckled, golden crust.
Baking & Finishing
- Bake the casserole. Place the dish in the preheated oven and bake for 30–35 minutes, or until the topping is deep golden brown and the sauce is bubbling around the edges. A visual cue is a fragrant, caramelized aroma filling your kitchen.
- Check for doneness. Insert a thin knife into the center; it should glide through the fruit easily while the topping stays firm. If the top begins to darken too quickly, loosely cover with foil for the remaining baking time.
- Rest before serving. Remove the casserole from the oven and let it sit for 5–7 minutes. This short rest allows the sauce to thicken slightly, making it easier to slice and serve.
- Optional garnish. Sprinkle a handful of extra toasted almonds or a dusting of shredded coconut on top for added texture and visual appeal just before plating.
- Serve warm. Pair each generous scoop with a scoop of vanilla ice cream, a dollop of whipped cream, or enjoy it plain for a comforting, tropical finish.
Tips & Tricks
Perfecting the Recipe
Use Ripe Pineapple: Choose pineapples that yield slightly to pressure and have a fragrant aroma; they provide natural sweetness and prevent a sour aftertaste.
Dry the Fruit: Pat the pineapple chunks dry after draining any juice. Excess moisture can make the topping soggy instead of crisp.
Butter Temperature: Melt the butter just until liquid; avoid overheating, which can cause the topping to become greasy rather than crumbly.
Flavor Enhancements
Add a tablespoon of orange zest to the wet mix for a citrusy lift, or stir in a pinch of ground ginger for gentle warmth. A drizzle of caramel sauce right before serving intensifies the sweet, tropical profile without overwhelming the dish.
Common Mistakes to Avoid
Skipping the short rest after baking often leads to a runny sauce that slides off the plate. Also, avoid using low‑fat coconut milk; it lacks the richness needed for a velvety sauce and can result in a thin, watery base.
Pro Tips
Toast the Oats: Lightly toast rolled oats in a dry skillet for 3‑4 minutes before mixing; this adds a nutty depth that elevates the topping.
Use a Glass Dish: Baking in a clear glass casserole dish lets you monitor the browning of the topping more accurately than metal.
Finish with a Splash of Lime: A quick squeeze of fresh lime juice right before serving adds a bright contrast to the sweet richness.
Variations
Ingredient Swaps
Replace fresh pineapple with canned crushed pineapple for convenience, or swap coconut milk for almond milk for a lighter texture. For a nut‑free version, omit the almonds and increase the shredded coconut. Adding diced mango or papaya introduces extra tropical layers.
Dietary Adjustments
Make it gluten‑free by using oat flour or almond flour in place of all‑purpose flour. Vegan diners can substitute butter with coconut oil and use a plant‑based sweetened condensed milk alternative. For a lower‑sugar option, cut the brown sugar by one‑third and add a splash of maple syrup.
Serving Suggestions
Serve the warm casserole over a scoop of coconut‑flavored ice cream for an extra tropical punch, or pair it with a dollop of Greek yogurt to balance the sweetness. A side of lightly toasted coconut flakes adds crunch and visual flair.
Storage Info
Leftover Storage
Allow the casserole to cool to room temperature, then transfer it to an airtight container. Refrigerate for up to 4 days. For longer keeping, portion into freezer‑safe bags, flatten, and freeze for up to 3 months. Label with the date to ensure freshness.
Reheating Instructions
Reheat leftovers in a preheated 325°F (160°C) oven for 15‑20 minutes, covered with foil to prevent drying. For a quicker option, microwave a single serving on medium power for 1‑2 minutes, adding a splash of coconut milk to restore moisture.
Frequently Asked Questions
This Tropical Delight Pineapple Casserole brings together bright fruit, creamy coconut, and a crunchy oat topping in a single, comforting bake. With clear, step‑by‑step guidance, storage tips, and creative variations, you have everything you need to make this dish a repeat favorite. Feel free to tweak flavors, add a splash of rum, or swap ingredients to suit your pantry. Serve warm, share generously, and enjoy the taste of sunshine on every spoonful.