Introduction
This Sweet Potato Rum Tres Leches Cake is an indulgent twist on the beloved Latin American dessert. It combines the cozy, earthy flavor of mashed sweet potatoes with the signature rich soak of three creamy milks and a splash of dark rum for extra depth. The result? A melt-in-your-mouth, ultra-moist cake that tastes like fall wrapped in velvet. It’s perfect for holidays, dinner parties, or whenever you want to wow guests with something that feels both familiar and excitingly new.
Pro Tip:
Let the cake cool slightly before pouring the milk mixture—but not too long. A warm cake absorbs the tres leches blend better, resulting in that irresistibly moist texture.
Serving Suggestions
- With Hot Coffee or Espresso – The rum and spices pair beautifully with a bold cup of coffee.
- As a Holiday Dessert – Serve after Thanksgiving or Christmas dinner in place of (or alongside) pie.
- With a Side of Roasted Fruit – A few slices of caramelized pears or baked apples make it even more special.
Variations
- Non-Alcoholic Version – Swap the rum for an equal amount of whole milk or coconut milk with a dash of rum extract.
- Dairy-Free – Use plant-based condensed and evaporated milks (available at many stores) and dairy-free whipped topping.
- Spiced Up – Add a pinch of nutmeg, allspice, or even ground ginger to the batter for a deeper autumn flavor.
- Coconut Twist – Replace half the evaporated milk with coconut milk and top with toasted coconut flakes.
Equipment Needed
- Mixing Bowls – For both the dry and wet ingredients, and for the milk soak.
- Electric Mixer or Whisk – Helps to beat eggs and sugar until light and fluffy.
- 9x13-Inch Baking Dish – The ideal size for even baking and soaking.
- Spatula – To mix and spread the batter evenly.
- Fork or Skewer – For poking holes to help the tres leches soak in fully.
Tips for Success
- Use well-mashed sweet potato with no lumps—this keeps the cake smooth and tender.
- Don’t overmix the batter once the flour is added; mix until just combined.
- Use room-temperature eggs for better volume and easier blending.
- Pour the milk mixture slowly, allowing it to fully absorb before adding more.
- Chill the cake before serving if you want a firmer texture—it also enhances the flavor!
Why You’ll Love This Recipe
It’s not just a cake—it’s an experience. Every bite is silky, rich, and full of flavor, with a comforting sweetness and just enough warmth from the rum to make it memorable. The sweet potato adds moisture and subtle sweetness, making this version of tres leches even more luscious than the original. It’s simple enough for a casual gathering but elegant enough to impress guests at any special occasion.
Sweet Potato Rum Tres Leches Cake Recipe Card
Prep Time: 20 minutes
Cook Time: 30 minutes
Total Time: 50 minutes
Servings: 4
Ingredients
For the Cake:
- 1 cup mashed sweet potatoes (about 1 medium sweet potato)
- 1 cup all-purpose flour
- 1 teaspoon baking powder
- ½ teaspoon baking soda
- ¼ teaspoon salt
- ½ cup sugar
- ½ cup vegetable oil
- 3 large eggs
- 1 teaspoon vanilla extract
- ½ cup milk
For the Soaking Mixture:
- ½ cup sweetened condensed milk
- ½ cup evaporated milk
- ¼ cup dark rum
For Topping:
- Whipped cream
- Ground cinnamon
Instructions
- Preheat Oven
Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking dish. - Mix Dry Ingredients
In a bowl, whisk together flour, baking powder, baking soda, and salt. - Make Wet Mixture
In another large bowl, beat together the sugar, vegetable oil, and eggs until light and fluffy. Stir in the vanilla and mashed sweet potatoes. - Combine Wet and Dry
Gradually add the dry mixture to the sweet potato mixture, alternating with the milk, mixing just until combined. - Bake the Cake
Pour the batter into the prepared baking dish and smooth the top. Bake for 25–30 minutes, or until a toothpick inserted in the center comes out clean. - Prepare the Milk Mixture
While the cake bakes, mix the condensed milk, evaporated milk, and rum in a bowl. - Soak the Cake
Let the cake cool for 10 minutes. Then use a fork to poke holes all over the surface. Slowly pour the milk mixture over the warm cake. Allow it to soak and cool completely. - Top and Serve
Spread whipped cream over the top and sprinkle with ground cinnamon just before serving.
Nutrition Information (Per Serving – Estimated)
- Calories: 400
- Protein: 6g
- Carbohydrates: 45g
- Fat: 20g
- Fiber: 2g
- Sugar: 25g
- Sodium: 160mg
FAQ
1. Can I make this cake in advance?
Yes! It actually tastes better after sitting for a few hours or overnight in the fridge.
2. How should I store leftovers?
Cover tightly and refrigerate for up to 4 days. The texture remains moist and delicious.
3. Can I freeze this cake?
You can freeze the unfrosted, soaked cake (well wrapped) for up to 2 months. Thaw overnight in the fridge and top with whipped cream before serving.
4. Can I use canned sweet potato?
Yes, as long as it’s pure sweet potato with no added sugar or seasonings.
5. What can I substitute for dark rum?
Try spiced rum, bourbon, or for a non-alcoholic option, use milk with a splash of rum extract.
Sweet Potato Rum Tres Leches Cake
Ingredients
Equipment
Method
- Preheat the oven to 175°C and grease the baking pan
- Peel and cook sweet potatoes until tender, then mash
- In a mixing bowl, cream together butter and sugar until light and fluffy
- Add eggs one at a time, beating well after each addition
- Mix in mashed sweet potatoes and vanilla extract
- In a separate bowl, whisk together flour baking powder and salt
- Gradually add dry ingredients to the wet mixture and mix until combined
- Pour batter into the prepared pan and smooth the top
- Bake for 35 to 40 minutes or until a toothpick inserted comes out clean
- While cake is baking, combine whole milk sweetened condensed milk evaporated milk and rum
- Allow the cake to cool slightly, then poke holes all over the surface
- Slowly pour the milk mixture over the cake, letting it soak in
- Refrigerate for at least 4 hours or overnight before serving
