Chocolate Rum Cake is a soft and moist dessert that usually bakes at 350 degrees for 30 to 38 minutes. This recipe is essentially a chocolate version of a tres leches cake using a rum-infused milk soak to create a very rich texture, similar to this decadent homemade chocolate cake.
It relies on a high-quality chocolate cake mix and a blend of three different types of milk. This method is helpful for home cooks because it removes the stress of baking from scratch while providing a gourmet result for any occasion. It is a reliable finish for a Mexican meal.
- Consistently moist from the milk soak
- Uses accessible ingredients and cake mix
- Balanced chocolate flavor without being too heavy
- Slight sweetness may not suit all tastes
- Requires soaking time to reach best texture
Table of Contents
Why You Will Love This Chocolate Rum Cake
I have spent many years in professional kitchens where everything was made from scratch. However, I have learned that some of the best home recipes come from a place of simplicity.
You will love this cake because it takes the stress out of the baking process, much like this gluten free cinnamon coffee cake. It allows you to focus on the textures and the flavors of the rum and coconut.
My family always asks for this during the holidays because it feels lighter than a heavy fudge cake. It is a dessert that brings people together without keeping you in the kitchen all night.
Chef Thomas has found that it tastes even better the next day after the flavors have had time to settle together. The chocolate base holds the rum soak perfectly without becoming mushy. It is a reliable crowd pleaser that works every single time.
Get The Recipe
Chocolate Rum Cake
Ingredients
Equipment
Instructions
- Heat oven to 350°F (325°F for dark or nonstick pan). Grease or spray bottom only of 13×9-inch pan.
- In large bowl, beat cake mix, water, oil and eggs with electric mixer on low speed 30 seconds, then on medium speed 2 minutes. Pour into pan.
- Bake 30 to 38 minutes or until toothpick inserted in center comes out clean. Let stand 5 minutes. In large bowl, mix 1 cup whipping cream, the whole milk, condensed milk and 1/3 cup rum. Pierce top of hot cake every 1/2 inch with long-tined fork, wiping fork occasionally to reduce sticking. Carefully pour whipping cream mixture evenly over top of cake. Cover and refrigerate about 3 hours or until chilled and most of whipping cream mixture has been absorbed into cake.
- In chilled large bowl, beat 1 cup whipping cream, 2 tablespoons rum and the vanilla on high speed until soft peaks form. Frost cake with whipped cream mixture. Sprinkle with coconut and pecans. Store covered in refrigerator.
Ingredients and Substitutions
What You Will Need
| Ingredient | Amount |
|---|---|
| Betty Crocker Super Moist Devil’s Food Cake Mix | 1 box |
| Water | 1 cup |
| Vegetable oil | 1/3 cup |
| Eggs | 3 |
| Whipping cream (for soak) | 1 cup |
| Whole milk | 1 cup |
| Sweetened condensed milk | 14 oz can |
| Rum (for soak) | 1/3 cup |
| Whipping cream (for topping) | 1 cup |
| Rum or rum extract | 2 tbsp or 1 tsp |
| Vanilla | 1/2 tsp |
| Flaked coconut, toasted | 1 cup |
| Chopped pecans, toasted | 1/2 cup |
Make sure your eggs are at room temperature before you start mixing the batter. This helps the cake mix incorporate more smoothly for a better crumb.
For the rum, I suggest using a gold or dark rum like Myers’s for a deeper flavor profile.
Substitutions
| Ingredient | Substitute |
|---|---|
| Rum | 1 tsp rum extract plus 2 tbsp water |
| Whole milk | Evaporated milk |
| Pecans | Toasted walnuts |
| Vegetable oil | Melted butter |
If the cake is too dry, add an extra egg to the batter for more richness. If the milk soak pools on top, poke more holes and let it sit at room temperature for ten minutes before refrigerating.
If you do not have rum, use rum extract mixed with water to maintain the flavor without the alcohol. If the whipped cream is too soft, make sure your bowl and cream are very cold before you start whisking.
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How To Make Chocolate Rum Cake
Pierce the hot cake every half inch with a fork and slowly pour the milk mixture over the top. Chef Thomas’s Tip: Wiping the fork occasionally prevents it from tearing the warm cake and ensures a clean glaze saturation technique.
Tools I Used for Chocolate Rum Cake
I have found that using the right basic tools makes this recipe much easier to manage. These are the items I pull from my own cupboard when I make this cake for my family.
- Strong, borosilicate glass construction for freezer to oven use withstands extreme temperature changes without the risk …
- Glass won’t stain or absorb odors and is easy to clean
- Generous handles on dish provide a safe and secure grip
- #1 MIXER BRAND IN THE WORLD* *Source: Euromonitor International Ltd. for retail sales revenue, USD, all retail channels….
- This hand mixer has the right speed for the task at hand, from mixing in nuts & chocolate chips at speed 1, to whipping …
- Pro whisk attachment for light and fluffy mixtures – easily whip egg whites to fluffy peaks or heavy cream to whipping c…
- Four polished stainless steel wires and flat shape are great for deglazing pans
- Innovative handle shape and soft non-slip grip absorb pressure
- 10 inches for a long reach
These tools help you get the texture just right. Browse my complete list of recommended cooking essentials here.
Pro Tips & Troubleshooting
Tips From Chef Thomas
Common Mistakes to Avoid
Vegetable oil provides a liquid fat that keeps the cake soft even when it is served cold.
The condensed milk adds a heavy sugar content that helps the liquid soak into the crumb without breaking it down.
High oven heat sets the cake structure quickly to support the weight of the three milks.
Chilling the cake for several hours allows the milk proteins to stabilize within the chocolate fibers.
The Secret to a Perfect Soak
In my early days as a chef, I used to think that using a box mix was a shortcut that compromised quality. I was wrong about that.
In a recipe like this Chocolate Rum Cake, the cake mix provides a consistent crumb that is designed to hold moisture. If you made a very light sponge from scratch, it might fall apart once you add the milk and rum, much like the layered approach used in this brownie refrigerator cake.
This recipe works because the cake mix is sturdy. I remember serving this at a large dinner party where people assumed I had spent hours balancing the ratios.
I just smiled and let them enjoy the cake. It taught me that a good host prioritizes the guest experience over their own pride in the kitchen. Using a 13×9 pan also makes serving very easy for a crowd.
The Science of Chocolate Rum Cake
If the cake surface peels, wipe your fork more often when poking the holes to reduce sticking.
If the nuts get soggy, wait to sprinkle the pecans and coconut until right before you serve the cake.
If the rum flavor is too strong, simmer the rum for one minute to cook off some of the alcohol before mixing it into the milk.
If the cake is too dense, check your oven temperature with a thermometer to ensure it is not running too low, similar to the approach used in this heavenly walnut banana cream cake.
If the glaze does not absorb, ensure you have poked enough holes and let the cake sit undisturbed for the full chilling period.
Variations and Adjustments
You can easily adapt this recipe to fit your preferences. For a pudding mix addition, stir one small box of instant chocolate pudding into the dry cake mix before adding the liquids for an even denser texture.
If you prefer using a Bundt pan, ensure you grease and flour the pan very well and let the cake cool for ten minutes before inverting it onto a rimmed plate, similar to the method used in this best homemade carrot cake.
For a from-scratch version, use your favorite devil’s food cake recipe as the base and follow the same milk soak and topping instructions. You can then pour the rum soak over the inverted cake slowly.
Storage & Make-Ahead
This cake must be stored in the refrigerator because of the dairy content in the soak and the topping. It will stay fresh and delicious for up to four days when covered tightly with plastic wrap, similar to this Mississippi chocolate mud cake.
I do not recommend freezing this cake because the milk soak can change texture once thawed. It is the perfect make-ahead dessert because it actually improves in flavor after twenty four hours of chilling.
FAQ About Chocolate Rum Cake
What kind of rum is best for chocolate rum cake?
A gold or dark rum is best because it has a deeper molasses flavor that stands up well to the chocolate. Light rum will work but the flavor will be much more subtle.
How do I keep the cake from sticking to the Bundt pan?
If you choose to use a Bundt pan, you must grease and flour every crevice carefully. Using a baking spray that contains flour is often the most effective way to prevent sticking.
Can I make this alcohol-free?
Yes, you can substitute the rum with rum extract. Use one teaspoon of extract for the soak and another teaspoon for the whipped cream topping.
How long should I let the cake cool before adding the milk mixture?
Let the cake cool for only five minutes. You want the cake to be hot when you add the liquid so it absorbs deeply into the center.
Enjoying Your Chocolate Rum Cake
Chocolate Rum Cake is a reliable and impressive dessert that fits into any home cook’s routine. It uses common pantry staples and a simple box mix to create something that tastes professional, much like this moist apple crumble coffee cake.
I enjoy making this because it reminds me that good food does not have to be complicated to be meaningful. You can prepare it a day in advance which takes the pressure off when hosting.
The combination of chocolate, rum, and toasted coconut is a classic profile that is very comforting. I hope this recipe becomes a regular part of your family gatherings.
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