Tropical Pineapple Rum Cake

Tropical Pineapple Rum Cake is a tender, moist butter cake soaked with spiced rum and topped with a glossy pineapple glaze. The cake absorbs the rum syrup while warm, so every bite stays juicy. A splash of rum extract in the batter deepens the flavor without adding more liquid.

Ingredients for Tropical Pineapple Rum Cake

All-purpose flour gives the cake structure and a tender crumb. Butter and sugar cream together to trap air, making the cake light. Eggs at room temperature blend smoothly and add richness. Crushed pineapple with juice keeps the batter moist and adds tropical flavor. Spiced rum and rum extract flavor the cake and the soaking syrup. Baking powder and baking soda lift the cake as it bakes. Salt and vanilla extract balance the sweetness. For the glaze, powdered sugar and pineapple juice make a smooth coating, while a touch of spiced rum adds depth.

Why This Tropical Pineapple Rum Cake Works

Crushed pineapple in the batter does two things: it adds moisture so the cake stays tender even after baking, and the natural acids in the fruit react with the baking soda to help the cake rise. This means you get a cake that is fluffy but never dry.

The rum syrup brushed on the warm cake soaks in quickly because the crumb is still hot and absorbent. This gives the cake its signature moist texture and boozy flavor. The glaze sets on top and keeps the moisture sealed in.

Room-temperature eggs and butter blend together smoothly, trapping more air than cold ingredients would. This air expands in the oven and creates the light, even crumb.

Mistakes To Avoid

Using cold eggs and butter prevents them from blending smoothly and traps less air. The result is a dense, tight crumb instead of a light, fluffy one. Let both sit at room temperature for 30 minutes before mixing.

Overmixing the batter after the flour goes in toughens the cake by overdeveloping gluten. Fold the flour in gently with a spatula until just combined, and stop as soon as you see no white streaks.

Brushing the syrup on a cold cake means it will not soak in and will sit on top instead. The cake stays dry inside. Always brush the syrup on while the cake is still hot from the oven.

Skipping the glaze leaves the cake dry on top and less flavorful. The glaze seals in moisture and adds a professional finish. Drizzle it over the cooled cake just before serving.

As an Amazon Associate, we earn from qualifying purchases.

Ingredients

• 2 cups (250 grams) all-purpose flour
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup (115 grams) butter, room temperature
• 1 1/2 cups (300 grams) granulated sugar
• 2 large eggs, room temperature
• 1 can (20 ounces) crushed pineapple with juice
• 1/4 cup spiced rum
• 1 teaspoon rum extract
• 1 teaspoon vanilla extract
• 1/4 cup spiced rum, for the syrup
• 1/4 cup pineapple juice, reserved from the can
• 2 tablespoons granulated sugar, for the syrup
• 2 cups (240 grams) powdered sugar, for the glaze
• 3 to 4 tablespoons pineapple juice, for the glaze
• 1 tablespoon spiced rum, for the glaze

Step-by-step Instructions

1. Preheat the oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.
2. In a small bowl, whisk together flour, baking powder, baking soda, and salt.
3. In a large bowl, beat butter and sugar with an electric mixer on medium speed for 3 to 4 minutes until pale and fluffy.
4. Add eggs one at a time, beating well after each addition, until combined.
5. Drain the crushed pineapple, reserving 1/4 cup juice for the syrup and 3 to 4 tablespoons for the glaze. In a small bowl, stir the drained pineapple, 1/4 cup rum, rum extract, and vanilla extract together.
6. Alternate adding the flour mixture and pineapple mixture to the butter mixture, beginning and ending with flour. Start with one-third of the flour, then half the pineapple mixture, then another third of the flour, then the remaining pineapple mixture, then the last of the flour. Fold each addition in gently with a spatula until just combined. Do not overmix.
7. Pour the batter into the prepared pan and smooth the top. Bake for 45 to 50 minutes until a toothpick inserted in the center comes out with a few moist crumbs and the top springs back when lightly touched.
8. While the cake bakes, make the syrup: in a small saucepan, combine 1/4 cup rum, 1/4 cup pineapple juice, and 2 tablespoons sugar. Heat over medium heat, stirring, until the sugar dissolves and the mixture is warm, about 2 minutes. Do not boil.
9. Remove the cake from the oven and let it cool in the pan for 10 minutes. Using a skewer or toothpick, poke holes all over the top of the cake. Slowly brush the warm rum syrup over the entire cake, letting it soak in as you go.
10. Let the cake cool completely in the pan, about 1 hour, then turn it out onto a cooling rack.
11. Make the glaze: in a bowl, whisk together powdered sugar, 3 to 4 tablespoons pineapple juice, and 1 tablespoon rum until smooth. Drizzle over the cooled cake and let it set for 15 minutes before serving.