Holiday Rum Cake is a moist vanilla butter rum Bundt cake that gets soaked with a buttery rum syrup. It’s rich, simple, and very much the kind of dessert I like on a holiday dessert table when you want something that slices neatly and still feels special.
The flavor is classic butter-rum with a warm vanilla edge, and the syrup is what keeps the crumb tender for days. I also like the option of adding pecans for a little crunch, but it’s just as good without them.
I usually serve this as a make-ahead cake for December gatherings, and it’s especially nice with coffee after a big meal. It’s one of those cakes that tastes even better the next day.
Why You’ll Love This Recipe
Holiday worthy: It looks great as a Bundt cake, and the rum-butter smell and flavor fit right in with holiday desserts.
Moist for days: The warm syrup soaks in and keeps the cake soft, not crumbly or dry.
Fast and easy: Using cake mix and pudding mix makes this a low-stress bake when your schedule is full.
Make-ahead friendly: I actually prefer it after it sits overnight because the rum and vanilla settle in.
Easy to slice: This is neat to serve, so it works well for potlucks, cookie trays, and dessert buffets.
Ingredients You’ll Need
Cake Batter
- Yellow cake mix: I use a standard box mix here for reliability and the right crumb. Any “classic” yellow cake mix works well.
- Instant vanilla pudding mix: Don’t skip this. It helps the cake stay moist and gives it that dense, buttery Bundt texture people expect from rum cake.
- Eggs: Regular large eggs are perfect. They give structure so the cake can handle all that syrup.
- Water: Plain water keeps it simple, and the rum and vanilla do the heavy lifting for flavor.
- Vegetable oil: This is part of what keeps the cake soft for days. Melted butter can work, but the texture changes a bit.
- Dark rum: Dark rum is my pick for a deeper, more old-school rum cake flavor. Light rum is fine if you want it milder.
- Vanilla extract: A small amount makes the cake taste more “finished,” especially with the pudding mix.
- Pecans (optional): I like chopped pecans in the bottom of the pan for a little crunch and a pretty top once you flip it out. You can leave them out if you want a smooth cake.
- Salt: Just a pinch helps the whole cake taste less flat and keeps the sweetness in check.
Pan
- Unsalted butter: I like butter for greasing a Bundt pan because it clings well in all the grooves.
- All-purpose flour: A quick dusting helps the cake release cleanly. Tap out the extra so you don’t get floury patches.
Rum Butter Syrup
- Unsalted butter: This is the “butter rum” part, and it gives the syrup that rich flavor that soaks in well.
- Granulated sugar: Regular white sugar dissolves easily and keeps the syrup clear and simple.
- Water: Just enough to get the syrup moving and help the sugar melt without scorching.
- Dark rum: Stir it in off the heat so the flavor stays strong. The syrup is where you really notice the rum.
- Vanilla extract: A little vanilla rounds out the syrup and makes it smell like a bakery cake in the best way.
- Salt: Another pinch here helps the syrup taste buttery instead of just sweet.
Recipe Instructions
- Preheat the oven: Heat the oven to 325°F and set a rack in the center.
- Prepare the pan: Grease a 10-inch Bundt pan with softened butter, then dust with flour and tap out the excess. Sprinkle pecans evenly in the bottom of the pan if you’re using them.
- Mix the batter: Whisk the cake mix and pudding mix together, then add the eggs, water, oil, rum, vanilla, and salt. Beat until smooth and slightly thickened.
- Bake: Pour the batter into the prepared pan and bake for about 55 to 65 minutes, until a toothpick comes out clean and the top springs back.
- Cool briefly: Cool the cake in the pan on a rack for 10 minutes.
- Cook the syrup: While the cake bakes, combine the butter, sugar, water, and salt in a saucepan over medium heat and bring to a gentle boil. Cook, stirring, until the sugar dissolves and the syrup thickens slightly, about 4 to 6 minutes.
- Finish the syrup: Remove the pan from the heat, then stir in the rum and vanilla.
- Soak the cake: While the cake is still warm and in the pan, poke it all over with a skewer. Slowly spoon about half the warm syrup over the cake and let it absorb.
- Invert the cake: Let the cake rest for 10 minutes, then invert onto a serving plate.
- Add more syrup: Brush or spoon the remaining syrup over the top and sides of the cake.
- Cool before slicing: Let the cake cool for at least 1 hour before slicing for the best texture.
Some of my tips!
This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.
Recipe Tips & Tricks
Grease the pan really well. Bundt cakes love to cling to the grooves. I take an extra minute to get butter into every nook, then flour it thoroughly.
Don’t overbake the cake. If you bake it too long, the syrup can’t fully fix a dry crumb. Start checking around the 55-minute mark and pull it when the toothpick comes out clean.
Use a skewer and poke deep. You want holes that go down into the cake, not just little dots on the surface. That’s what helps the syrup soak in evenly.
Pour the syrup on slowly. If you rush it, it just pools and runs down the sides. Slow spoonfuls give it time to sink in.
Add the rum off the heat. Stirring it in after you take the syrup off the burner keeps the rum flavor stronger and cleaner.
Make some touches!
There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.
Serving Suggestions
- Coffee or espresso: This cake is really good with coffee, especially after dinner. I like it with plain black coffee or an espresso.
- Whipped cream: A small spoonful of lightly sweetened whipped cream is plenty. It makes the slices feel a little more like a plated dessert.
- Vanilla ice cream: If you want something cold and simple, serve a slice with a small scoop. It’s especially nice if the cake is at room temp.
- Fruit: Fresh berries or sliced oranges are nice on the side. They keep the plate from feeling too heavy.
Save it for later
This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.
Storage and Make Ahead
Store the cake covered at room temperature for up to 3 days. I usually keep it under a cake dome or wrapped well so it doesn’t dry out.
For a longer hold, refrigerate it for up to 5 days. Let slices sit out for a bit before serving so the texture softens back up.
You can make this recipe ahead, and I actually recommend it. The flavor is better the next day after the syrup has had time to settle into the cake.
If you want to freeze it, freeze individual portions or freeze the whole cake wrapped tightly. Thaw in the fridge overnight or on the counter for a few hours before serving.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
Do I have to use dark rum?
No. Dark rum gives a deeper, more classic rum cake flavor, but light rum works too if you want it milder. The cake will still be moist and buttery either way.
Can I make this alcohol-free?
Yes. Replace the rum with water and add rum extract to taste. I’d add a little at a time, especially in the syrup, since rum extract can get strong fast.
How do I know when the Bundt cake is done?
A toothpick should come out clean, and the top should spring back when you press it lightly. If it looks wet or sinks when pressed, give it a few more minutes and check again.
Why do I soak the cake while it’s still in the pan?
Keeping it in the pan for the first soak helps the syrup stay where it needs to be, instead of running off the sides. It also makes the cake less likely to break when you flip it out.
Can I leave out the pecans?
Definitely. The pecans are optional and mostly add a little crunch and a pretty top. If you’re serving someone with a nut allergy, just skip them and grease/flour the pan as usual.
You might also like
Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.
MORE DINNER RECIPES TO TRY
Holiday Rum Cake
INGREDIENTS
Cake Batter
- 1 box yellow cake mix 15 25 oz
- 1 box instant vanilla pudding mix 99 g
- 4 large eggs
- 1 2 cup water
- 1 2 cup vegetable oil
- 1 2 cup dark rum
- 1 tsp vanilla extract
- 1 2 cup chopped pecans optional
- pinch salt.
Pan
- 2 tbsp unsalted butter softened for greasing
- 2 tbsp all purpose flour for dusting.
Rum Butter Syrup
- 3 4 cup unsalted butter
- 1 cup granulated sugar
- 1 4 cup water
- 1 2 cup dark rum
- 1 tsp vanilla extract
- pinch salt.
INSTRUCTIONS
Bake Cake
- Preheat oven to 325 F and set rack in the center
- grease a 10 inch Bundt pan with butter and dust with flour tapping out excess
- sprinkle pecans evenly in the bottom of the pan if using
- whisk cake mix and pudding mix then add eggs water oil rum vanilla and salt and beat until smooth and slightly thickened
- pour batter into pan and bake until a toothpick comes out clean and the top springs back about 55 to 65 minutes
- cool cake in pan on a rack for 10 minutes.
Make Syrup
- While cake bakes combine butter sugar water and salt in a saucepan over medium heat and bring to a gentle boil
- cook stirring until sugar dissolves and syrup thickens slightly about 4 to 6 minutes
- remove from heat and stir in rum and vanilla.
Soak And Serve
- Poke the warm cake all over with a skewer while still in the pan
- slowly spoon about half the warm syrup over the cake letting it absorb
- let rest 10 minutes then invert onto a plate and brush or spoon remaining syrup over the top and sides
- cool at least 1 hour before slicing for best texture.
