Aruba Cashew Cake Recipe: Tropical Nutty Moisture With Rum Infusion

This Aruba cashew cake brings the island's sun-drenched flavors to your kitchen with its perfect balance of tropical sweetness and nutty richness. 🌴 The secret lies in soaking cashews until they're tender and infused with rum, creating a moist, velvety texture that stays fresh for days.

I developed this recipe after tasting authentic versions at Aruban bakeries, where the combination of warm spices and rum-infused cashews creates an irresistible dessert. What sets this cake apart is its moisture—no dry crumbs here.

The cashews absorb the rum and coconut milk, while the warm spices like cinnamon and nutmeg add depth that echoes Aruba's spice markets. The cake bakes to a golden brown with a tender crumb that's both rich and light, making it perfect for special occasions or a luxurious weekend treat.

The rum infusion isn't overpowering—just enough to add warmth and complexity without dominating the natural sweetness of the cashews. Topped with a dusting of powdered sugar or fresh tropical fruit, this cake becomes a centerpiece that transports you to Aruba's shores with every bite.

The recipe is designed to be foolproof, ensuring consistent results whether you're a baking novice or a seasoned pro. Serve with a cup of strong coffee or a glass of tropical fruit punch to complete the experience.

The cake's versatility makes it ideal for celebrations, holiday gatherings, or simply indulging in a little island-inspired luxury. Let's get baking!

Ingredients for aruba cashew cake

Tropical flavors meet nutty richness in this rum-infused cashew cake.

The cashews are the star here—raw, unsalted ones work best for that authentic Aruban texture. Costco or bulk bins usually have the best prices, but any grocery store carries them. Soak those nuts overnight in rum and coconut milk—this is where the magic happens. The rum infusion isn't overpowering, but it adds that warm, island vibe. For the rum, Captain Morgan or Gosling's are my go-tos, but any aged 3+ year rum will do. The coconut milk? Full-fat canned version gives that rich, velvety texture we're after—none of that watery stuff.

No rum? Apple juice or orange juice works in a pinch, though it'll lack that caramel depth. Fresh pineapple for garnish? Canned crushed pineapple (drained well) saves time. The brown sugar needs to be packed firmly—don't scoop it, press it down in the cup. For the spices, Penzeys has the best ground cinnamon and nutmeg, but regular grocery store brands work fine. The vanilla extract matters here—pure Madagascar has the most complex flavor, but imitation will still work if that's what you've got. Eggs should be room temperature, but if you forget, just let them sit out for 30 minutes before using.

This cake keeps beautifully—5 days wrapped at room temperature, or 2 weeks in the fridge. For long-term storage, slice and freeze portions for up to 3 months. The rum-soaked cashews make it extra moist, so it won't dry out like some cakes. I always make a double batch—one for now, one for later. The powdered sugar topping is optional but adds that final tropical touch. Serve with strong coffee or a glass of rum punch for the full Aruban experience.

Step-by-step instructions for Aruba cashew cake

Here's how to bake this tropical nutty cake with perfect moisture and rich rum flavor.

Preheat your oven to 350°F and spread the 2 cups raw cashews on a baking sheet. Toast them for 8-10 minutes until they're fragrant and just beginning to turn golden. Watch them closely—they burn quickly! Let them cool completely before processing.

Toasted cashews add deep nutty flavor that's completely different from raw. I like to pulse them in a food processor until they're finely chopped but still have some texture—about the size of coarse sand. This gives the cake that perfect nutty bite without being too gritty.

In a large mixing bowl, combine the 1.5 cups light brown sugar, 13.5 oz unsweetened coconut milk, 0.5 cup dark rum, 1 tbsp vanilla extract, and the 4 whole large eggs. Whisk until everything is completely incorporated and the mixture looks smooth and pale.

Here's the thing—brown sugar should be packed firmly when measuring. I press it down in the measuring cup and level it off with a knife. The coconut milk should be full-fat for maximum richness, and the rum adds that authentic Aruban flavor. Mix for about 2 minutes to fully emulsify everything.

In a separate bowl, sift together the 2 cups all-purpose flour, 2 tsp baking powder, 1 tsp ground cinnamon, and 0.5 tsp ground nutmeg. Then gently fold these dry ingredients into your wet mixture using a spatula, being careful not to overmix. Just combine until no dry spots remain.

I always use a rubber spatula for this step because it's more gentle than a metal spoon. You want to preserve as much air as possible in the batter for a light cake. Once combined, fold in the toasted cashews and any 1 cup fresh pineapple (if using) with the spatula until evenly distributed.

Pour the batter into a greased and floured 9-inch round cake pan (or your preferred size). Bake in your preheated 350°F oven for 45-50 minutes until a toothpick inserted in the center comes out clean and the top is golden brown. Don't overbake—this cake is delicate!

The cake should spring back slightly when you press the center gently. I like to tent it loosely with foil after 30 minutes to prevent over-browning on top while still allowing it to rise properly. The rum flavor will be subtle but present—don't worry if it doesn't smell like a bar!

Let the cake cool in the pan for 15 minutes, then transfer to a wire rack to cool completely. While it cools, melt the 0.5 cup unsalted butter in a microwave-safe bowl in 30-second intervals, stirring between each, until completely smooth. Mix with the 0.5 cup powdered sugar until combined.

Spread this simple buttercream frosting over the cooled cake. The cake's natural moisture means it doesn't need to be overly sweet—just enough to complement the nutty flavors. For presentation, I like to garnish with fresh pineapple slices on top and around the sides, adding that tropical Aruban touch.

Flavor customization for this aruba cashew cake

Rum Infusion Levels

Adjust the rum amount based on your preference. For a subtle tropical hint, use ¼ cup instead of the full ½ cup—this keeps the island vibe without overpowering.

If you love bold flavors, try ⅔ cup for a deeper rum character. Remember, the rum soaks into the cashews overnight, so the flavor develops gradually. 🍹

Spice Variations

Swap the cinnamon and nutmeg for other warm spices. Try 1 tsp cardamom for an exotic twist or ½ tsp allspice for a Caribbean touch. For a citrusy profile, add 1 tsp orange zest to the dry ingredients. Each spice brings a unique depth—experiment to find your favorite combination!

Sweetness Control

Reduce the brown sugar to 1 cup for a lighter cake, or increase to 1¾ cups for extra richness. If using honey instead of sugar, start with 1 cup and adjust to taste—honey's intensity can vary. The cashews naturally add sweetness, so monitor carefully to avoid an overly sugary result.

Tropical Fruit Add-Ins

Replace pineapple with 1 cup diced mango or ½ cup chopped passion fruit for different tropical flavors. For a citrus kick, add 1 tbsp lemon juice to the wet ingredients. These additions brighten the cake while keeping the nutty base intact—perfect for summer gatherings.

Gluten-Free Adaptation

Swap the all-purpose flour for a 2:1 gluten-free flour blend (like Bob's Red Mill). Add ½ tsp xanthan gum to improve texture. The cake will still be moist, though slightly denser. For extra richness, increase the coconut milk to 15 oz to compensate for the different flour absorption.

Nut-Free Option

Replace cashews with 2 cups finely chopped dates or 1½ cups mashed banana for a nut-free version. The texture will be slightly different but still delicious. If using dates, soak them in the rum and coconut milk mixture overnight to soften.

This keeps the tropical vibe while making the cake more inclusive. 🌱

Frequently asked questions