Holiday Rum Cupcakes are moist, spiced cupcakes brushed with a buttery rum syrup and topped with a rum buttercream frosting. They taste like warm cinnamon and nutmeg with that deeper, molasses-y rum note that feels right for December.
I really like this version because the syrup keeps the cake tender and gives you that holiday rum flavor all the way through, not just in the frosting. The buttercream is smooth and rich, and a little nutmeg on top makes them look finished without doing much.
These are my go-to when I want a festive dessert that’s still easy to portion and serve. They’re great on a holiday platter, and I like them with coffee after dinner or alongside a little fruit if I’m putting together a dessert table.
Why You’ll Love This Recipe
Holiday worthy: Cinnamon, nutmeg, and dark rum make these taste like a real holiday dessert, not just a plain vanilla cupcake with “seasonal” frosting.
Extra moist: Brushing the warm cupcakes with rum syrup keeps the crumb soft and gives the cake a richer flavor.
Simple to serve: Cupcakes are easy for parties—no slicing, no plates required if you don’t want them.
Deep rum flavor: Using dark rum gives you those caramel/molasses notes that work so well with warm spices.
Flexible: You can go boozy or alcohol-free, depending on who you’re serving.
Ingredients You’ll Need
Cupcakes
- All-purpose flour: I use regular all-purpose flour here. It gives you a soft cupcake that still has enough structure to handle the syrup and frosting.
- Baking powder: This gives the cupcakes their main lift. Make sure it’s fresh, especially if yours has been hanging out in the pantry for a while.
- Baking soda: A small amount helps the crumb stay tender. Don’t skip it.
- Ground cinnamon: Cinnamon is the main spice note. If your cinnamon is old and smells dusty, it’s worth replacing for this recipe.
- Ground nutmeg: Nutmeg makes these taste more “holiday” to me than any other spice. Freshly grated is great, but pre-ground is totally fine.
- Fine salt: Salt keeps the cupcake from tasting flat, especially with rum and butter in the mix.
- Unsalted butter: Softened butter creams better with sugar and gives the cupcakes a richer texture.
- Granulated sugar: Keeps the crumb light and clean-tasting. Brown sugar can shift the flavor and texture, so I stick with white sugar here.
- Eggs: Room temperature eggs blend in more smoothly. Cold eggs can make the batter look a little curdled.
- Vanilla extract: Vanilla rounds everything out and makes the rum taste more like rum, if that makes sense.
- Dark rum: I prefer dark rum for that deeper flavor. Light rum works, but it won’t have the same caramel note.
- Whole milk: Whole milk gives a softer crumb. I’d avoid skim here if you can.
Rum Syrup
- Unsalted butter: This is what makes the syrup taste rich and a little toffee-like once it soaks into the cupcake.
- Granulated sugar: Sweetens the syrup and helps it cling to the cake instead of disappearing like plain rum would.
- Water: Just enough to dissolve the sugar and get the syrup going.
- Dark rum: Stir it in off the heat so you keep the flavor. Dark rum is especially good here.
- Fine salt: A pinch makes the syrup taste more balanced.
Rum Buttercream
- Unsalted butter: Softened butter is key so the frosting beats up smooth instead of lumpy.
- Powdered sugar: Sift it if yours is clumpy. It makes a big difference in how smooth the buttercream feels.
- Dark rum: Start with a little, then add more to taste. Too much at once can make the frosting loose.
- Vanilla extract: Keeps the buttercream from tasting like straight sugar and butter.
- Heavy cream or milk: I use a splash only if needed to get it pipeable. Cream gives a slightly richer feel than milk.
- Fine salt: Just a pinch so the frosting doesn’t taste overly sweet.
- Ground nutmeg: A light dusting on top looks nice and ties back to the spices in the cupcake.
Recipe Instructions
- Preheat the oven: Heat the oven to 350°F and line a 12-cup muffin pan with cupcake liners.
- Mix the dry ingredients: Whisk the flour, baking powder, baking soda, cinnamon, nutmeg, and salt together in a medium bowl.
- Cream the butter and sugar: Beat the softened butter and granulated sugar until light and fluffy.
- Add the eggs: Beat in the eggs one at a time, then mix in the vanilla and rum.
- Add the dry ingredients: Add the dry ingredients in two additions, alternating with the milk, mixing just until combined.
- Fill the liners: Divide the batter evenly among the liners, filling each about two-thirds full.
- Bake: Bake for 18 to 22 minutes, until a toothpick comes out clean. Cool in the pan for 5 minutes, then transfer the cupcakes to a rack.
- Make the syrup: Simmer the butter, sugar, water, and salt until the sugar dissolves, about 2 to 3 minutes. Remove from heat and stir in the rum.
- Brush the cupcakes: Brush the warm cupcakes with syrup in 2 to 3 passes, letting it soak in between coats. Let the cupcakes cool completely.
- Make the buttercream: Beat the butter until creamy, then gradually beat in the powdered sugar and salt. Add the rum, vanilla, and enough cream to reach a smooth, pipeable consistency, then beat 1 to 2 minutes until fluffy.
- Frost: Frost the cooled cupcakes and finish with a light dusting of ground nutmeg.
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
Don’t overmix after the flour goes in. Once you start adding the dry ingredients, mix just until you don’t see streaks of flour. Overmixing is what makes cupcakes turn a little tough.
Use dark rum if you can. It gives a deeper, more caramel-like flavor that works really well with cinnamon and nutmeg. Light rum is fine, but it tastes a bit sharper and less “holiday.”
Brush the syrup while the cupcakes are warm. Warm cake absorbs syrup better, so you actually taste it in the crumb. I like doing a few lighter coats instead of dumping it all on at once.
Adjust the buttercream with a light hand. Add cream a little at a time so the frosting doesn’t get too loose. If it does soften too much, chill it for 10 minutes and then rewhip.
Go easy on the nutmeg garnish. A small dusting is enough. Too much nutmeg on top can taste bitter.
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: These are really good with coffee, especially after dinner. I like a strong cup because the cupcakes are rich.
- Hot chocolate: If you’re serving these at a holiday party, hot chocolate (even for adults) makes sense with the warm spices. A little whipped cream on the mug is nice.
- Fruit: Fresh berries or sliced oranges are nice on the side if you want something lighter on the plate. It breaks up all the butter and sugar in a good way.
- Ice cream: A scoop of vanilla ice cream works if you’re plating these as a sit-down dessert. I usually skip extra sauce since the cupcakes already have syrup.
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 frosted cupcakes covered in the fridge for up to 4 days. Bring them to room temperature before serving so the cake softens and the buttercream isn’t too firm.
If you want to make this recipe ahead, bake the cupcakes and brush on the syrup, then hold off on frosting until closer to serving. I think the texture is best this way, especially if you’re transporting them.
You can also freeze unfrosted cupcakes (syrup and all) in an airtight container. Thaw in the fridge overnight, then bring to room temperature and frost.
If the buttercream stiffens in the fridge, let it sit out for 20 to 30 minutes and give it a quick stir. It usually smooths right back out.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
Can I make these alcohol-free?
Yes. Swap the rum in the cupcakes with 1 to 2 teaspoons rum extract (to taste), and use milk in place of the rum in the syrup. For the buttercream, use rum extract instead of rum and add a little extra cream if needed.
What kind of rum works best?
I like dark rum here because it has a deeper, slightly molasses flavor that goes well with cinnamon and nutmeg. Spiced rum works too, but it can push the spice flavor a bit far depending on the brand.
How do I know when the cupcakes are done?
A toothpick should come out clean, and the tops should spring back lightly when you press them. Start checking around 18 minutes since overbaking dries them out fast.
My buttercream is too soft—what should I do?
Chill it for about 10 minutes, then rewhip. If it’s still loose, add a little more sifted powdered sugar, but I usually try chilling first since too much sugar can make it taste overly sweet.
Can I use a different milk?
Whole milk gives the nicest texture, but 2% will work. I’d avoid nonfat if you can, since it can make the cupcakes a little less tender.
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 Cupcakes
INGREDIENTS
Cupcakes
- 1 1 2 cups all purpose flour
- 1 1 2 tsp baking powder
- 1 4 tsp baking soda
- 1 2 tsp ground cinnamon
- 1 4 tsp ground nutmeg
- 1 4 tsp fine salt
- 1 2 cup unsalted butter softened
- 3 4 cup granulated sugar
- 2 large eggs room temperature
- 1 tsp vanilla extract
- 1 4 cup dark rum
- 1 2 cup whole milk room temperature.
Rum Syrup
- 1 4 cup unsalted butter
- 1 4 cup granulated sugar
- 3 tbsp water
- 3 tbsp dark rum
- pinch fine salt.
Rum Buttercream
- 1 cup unsalted butter softened
- 3 1 2 cups powdered sugar sifted
- 2 tbsp dark rum plus more to taste
- 1 tsp vanilla extract
- 2 tbsp heavy cream or milk as needed
- pinch fine salt
- ground nutmeg for garnish.
INSTRUCTIONS
Cupcakes
- heat oven to 350 F and line a 12 cup muffin pan with liners
- whisk flour baking powder baking soda cinnamon nutmeg and salt
- beat butter and sugar until light and fluffy then beat in eggs one at a time followed by vanilla and rum
- add dry ingredients in two additions alternating with milk mixing just until combined
- divide batter evenly among liners filling about two thirds full and bake until a toothpick comes out clean 18 to 22 minutes then cool in pan 5 minutes and transfer to a rack.
Rum Syrup And Finish
- simmer butter sugar water and salt until sugar dissolves 2 to 3 minutes then remove from heat and stir in rum
- brush warm cupcakes with syrup in 2 to 3 passes letting it soak between coats then cool completely.
Rum Buttercream
- beat butter until creamy then gradually beat in powdered sugar and salt
- add rum vanilla and enough cream to reach a smooth pipeable consistency then beat 1 to 2 minutes until fluffy
- frost cooled cupcakes and finish with a light dusting of nutmeg.
