Bacardi Rum Cake Recipe Duncan Hines: Boozy Caramelized Layers With Citrus Zing

This Bacardi Rum Cake recipe using Duncan Hines mix delivers layers of caramelized richness and citrusy rum flavor that’ll have everyone asking for seconds. The secret lies in soaking each layer with a reduced rum syrup—no fancy techniques, just a few key steps that transform simple cake mix into something extraordinary. I’ve perfected this version over years of baking, ensuring the texture stays moist while the rum flavor shines through without overpowering the cake.

The process is straightforward but requires patience: mix the batter as directed, bake in layers, then brush each one with a warm rum syrup while still slightly warm. This ensures the alcohol infuses deeply rather than just sitting on top. For extra indulgence, top with a simple cream cheese frosting or a dusting of powdered sugar—either way, the result is a dessert that tastes like a tropical vacation in every bite.

What makes this recipe stand out is the balance—sweet but not cloying, boozy but not harsh, and perfectly moist thanks to the rum reduction. The caramelized edges from baking add depth, while the citrus notes in the rum cut through the richness. It’s the kind of dessert that feels special enough for company but simple enough to make on a weeknight.

Ready in about 1 hour (including baking and cooling time), this cake keeps well for up to 3 days covered at room temperature or can be frozen for up to 1 month. Serve with a dollop of whipped cream or a scoop of vanilla ice cream for the full experience. Let’s get baking!

Ingredients for bacardi rum cake recipe duncan hines

Three boxes of cake mix, a splash of rum, and citrus zest transform into decadent boozy layers.

The rum is non-negotiable—Bacardi Superior delivers that perfect balance of sweetness and citrus. Grocery stores usually stock it, but if you're in a pinch, Kroger or Publix always have it. For the orange juice, fresh is best, but not-from-concentrate works in a bind. The zest needs to be vibrant—Navel or Valencia oranges work best. I always buy two oranges: one for juice, one for zest. The cake mix? Duncan Hines Classic or Spice Cake both work, but avoid the devil's food variety—it's too rich for this recipe.

No rum? Substitute with apple juice plus 1 tsp vanilla extract—it won't be the same, but it'll still taste great. Short on orange juice? Grapefruit juice at half the amount adds a tangy twist. The butter must be softened, not melted—room temperature is key. For the powdered sugar topping, confectioners' sugar is a must; regular granulated won't dissolve properly. The cream, if using, should be heavy whipping cream—half-and-half won't whip right.

This cake keeps beautifully—3 days covered at room temperature or 1 month frozen. Wrap tightly in plastic wrap, then foil for freezing. The rum syrup soaks in best when the cake is still slightly warm, so plan ahead. For extra indulgence, brush the top with a little extra rum syrup before serving. The flavors deepen overnight, so it's even better the next day.

Step-by-step instructions for Bacardi rum cake

Here's how to create layers of rich rum-soaked cake with caramelized edges and bright citrus notes.

In a small saucepan, combine the 1 cup Bacardi Superior Rum and 1 cup Granulated Sugar. Bring to a boil over medium-high heat, then reduce heat to medium and simmer for 8-10 minutes until the mixture thickens to a syrupy consistency. You'll see it darken slightly and reduce by about half—this concentrated flavor is what makes the cake special.

Remove from heat and stir in the 2 tsp Vanilla Extract and 1 tbsp Orange Zest. Let it cool completely before using—this ensures the rum flavor infuses properly without overpowering the cake. The reduction should be thick enough to coat the back of a spoon but still pourable. If it thickens too much while cooling, gently reheat for 30 seconds to loosen it back up.

In a large mixing bowl, combine the 3 boxes Duncan Hines Spice Cake Mix, 0.5 tsp Salt, and 0.5 tsp Ground Cinnamon. Make a well in the center and add the 1 cup softened Unsalted Butter, 4 whole Large Eggs, and the cooled rum reduction. Using an electric mixer on low speed, gradually blend until just combined—you should still see some dry mix in the batter.

Add the 0.5 cup Orange Juice and mix again until smooth. The batter will be thick but spreadable. Here's the thing—don't overmix. You want a few lumps to remain, as this prevents the cake from becoming dense. The batter should be slightly sticky but not runny. If it looks too thick, add 1-2 tablespoons of water to help it flow more easily into the pans.

Preheat your oven to 350°F. Grease and flour three 8-inch round cake pans or line them with parchment paper circles. Divide the batter evenly among the pans. Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean. The edges should be golden brown, but the tops might look slightly underdone—that's normal with rum cakes.

Let the cakes cool in their pans for 10 minutes, then transfer to a wire rack to cool completely. This cooling step is crucial—it allows the cakes to set properly and prevents them from becoming soggy when you add the rum-soaked syrup later. If you try to assemble them while still warm, the layers will slide and the cake will collapse.

While the cakes cool, make the rum syrup by combining ½ cup of the cooled rum reduction with ½ cup Orange Juice in a small saucepan. Bring to a gentle simmer over low heat for 3-4 minutes until slightly thickened. Remove from heat and let cool completely.

Place one cake layer on a serving plate. Brush the top evenly with ¼ cup of the rum syrup, then sprinkle with ½ cup Powdered Sugar. Repeat with the remaining two layers, brushing each with syrup and dusting with powdered sugar. The syrup should be absorbed quickly, but don't worry if a little pools on top—it will caramelize beautifully when torched later.

In a chilled bowl, whip the 1 cup Heavy Whipping Cream until soft peaks form. Fold in ½ cup Powdered Sugar until combined. Spread this over the top and sides of the assembled cake. For that signature caramelized look, lightly torch the whipped cream with a kitchen torch until golden brown in spots—this adds a smoky aroma that complements the rum flavor perfectly.

Let the cake sit for 10 minutes after torching to allow the whipped cream to set slightly. Serve at room temperature so the flavors meld together. Each slice should reveal moist, rum-infused cake layers with a bright citrus finish and a hint of caramelized sweetness from the torched cream. This cake keeps well for 3-4 days covered at room temperature, though it's best enjoyed fresh.

Essential equipment for perfect results

Mixing Essentials

You’ll need a stand mixer or hand mixer for blending the batter smoothly—I use my KitchenAid Artisan Series because it handles thick batters like this without overheating. A large mixing bowl (at least 5-quart capacity) prevents spills when combining the cake mix with wet ingredients. For measuring, grab a liquid measuring cup for the rum and orange juice, and a dry measuring cups set for the powdered sugar and spices. 🥄

Baking Tools

Three 8-inch round cake pans are non-negotiable for even layers. I recommend Wilton Perfect Results Pans—they’re durable and release cakes easily. Line the bottoms with parchment paper circles to prevent sticking, or grease with butter and flour if you prefer. A cooling rack is essential for letting cakes set properly without soggy bottoms. Pro tip: Place a silicon mat under the pans to catch any drips during baking.

Rum Reduction Setup

A small saucepan (2-quart size) handles the rum reduction perfectly without boiling over. I use Calphalon stainless steel—it heats evenly and won’t react with the alcohol. A wooden spoon or heatproof spatula helps stir the syrup without scratching your pan. For cooling, a wire cooling rack over a bowl catches any drips while letting the syrup thicken safely. A fine-mesh strainer removes zest bits if you prefer a smoother texture. 🍹

Assembly Gear

Assembling requires a serving plate large enough for your cake (I use a 12-inch ceramic platter). A pastry brush (or clean silicone brush) distributes the rum syrup evenly—West Bend silicone brushes are my go-to for their durability. For the whipped cream topping, a chilled metal bowl and hand mixer (or whisk) create stiff peaks. A kitchen torch adds the caramelized finish, but a broiler works in a pinch—just watch closely to avoid burning. 🔥

Optional Extras

If you’re torching the whipped cream, keep a heatproof spatula nearby to smooth any melted spots. For garnish, orange slices or maraschino cherries add a festive touch. Store leftovers in an airtight container with parchment between layers to keep them moist. A digital kitchen scale comes in handy if you’re experimenting with ingredient ratios—though this recipe’s measurements are foolproof for beginners. 💫

Frequently asked questions