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If you are ready to indulge in a Southern classic that truly melts in your mouth, the Classic Kentucky Butter Cake with Vanilla Rum Syrup Recipe is the perfect delight for your dessert cravings. This moist old-fashioned bundt cake is drenched in a warm, buttery syrup infused with vanilla and a hint of rum that transforms every bite into a tender and flavorful experience. Whether you’re baking for a special occasion or just because, this cake will bring a touch of heartwarming tradition and irresistible sweetness to your table.
Ingredients You’ll Need
This recipe uses simple, pantry-friendly ingredients that come together to create an incredibly rich and tender cake. Each element plays a role in texture, flavor, or that gorgeous golden hue that makes this cake so inviting.
- All-purpose flour: Provides structure and the perfect crumb for the cake’s tender bite.
- Baking powder: Helps the cake rise beautifully and keeps it light.
- Salt: Balances sweetness and brings out the buttery flavors.
- Unsalted butter: Adds richness and moistness to both cake and syrup.
- Butter-flavored shortening: Enhances tenderness without overpowering the flavor.
- Granulated sugar: Sweetens the cake and contributes to its soft texture.
- Eggs: Bind the ingredients together while adding a light, airy quality.
- Vanilla extract: Deepens the flavor with its soothing, warm aroma.
- Rum extract: Gives the cake and syrup their signature boozy flair without the alcohol’s intensity.
- Buttermilk: Adds moisture and a slight tang enhancing the cake’s richness.
- Water (for syrup): Dilutes the syrup just enough for perfect absorption.
How to Make Classic Kentucky Butter Cake with Vanilla Rum Syrup Recipe
Step 1: Prepare Your Pan and Ingredients
Begin by preheating your oven to 325 degrees Fahrenheit and greasing and flouring a bundt pan to ensure your cake releases easily once baked. Then whisk together your dry ingredients—flour, baking powder, and salt—in a large bowl so they are ready to be incorporated smoothly later on.
Step 2: Cream Butter and Shortening
Using a mixer on low speed, blend the unsalted butter and butter-flavored shortening until well combined. This mixture is the key to the cake’s tender crumb, so take the time to get it smooth and creamy before moving forward.
Step 3: Add Eggs and Sugar Alternately
Slowly add the eggs and sugar in alternating portions, mixing briefly after each addition. This technique traps air in the batter, which helps the cake rise and become fluffy. Stop mixing as soon as everything is combined to avoid a dense texture.
Step 4: Flavor the Batter
Stir in the vanilla and rum extracts, two ingredients that give the cake its distinct and warm, inviting character. These extracts tie the entire recipe together with an elegant softness in every bite.
Step 5: Combine Wet and Dry Ingredients
Alternately add the dry flour mixture and buttermilk into the batter, starting and ending with the flour. Mixing just enough to combine keeps the cake tender and moist—the hallmark of the Classic Kentucky Butter Cake with Vanilla Rum Syrup Recipe.
Step 6: Bake the Cake
Pour your luscious batter into the prepared bundt pan and give it a gentle shake to settle the batter and release any trapped air bubbles. Bake on the middle rack for about 1 hour and 15-20 minutes until a tester comes out clean or with just a few moist crumbs attached.
Step 7: Poke Holes and Prepare the Syrup
Once the cake is out of the oven, carefully poke holes across the surface with a skewer or fork, being mindful not to poke all the way through to the top. Meanwhile, melt butter in a saucepan over medium-low heat and add sugar and water, stirring until the sugar dissolves and the syrup thickens slightly but does not boil. Remove from heat and stir in vanilla and rum extracts.
Step 8: Soak the Cake with Syrup
Slowly spoon the warm butter syrup over the cake, focusing on filling each hole to infuse maximum moisture and flavor. Save a little syrup for brushing on the outer surface later. Let the cake sit for about 10 minutes so the syrup is absorbed, but don’t wait too long or the cake may stick to the pan.
Step 9: Cool and Finish
Carefully remove the cake from the pan and allow it to cool for about an hour to let the syrup soak in fully. When ready to serve or store, warm the leftover syrup and brush it over the cake’s exterior, adding extra gloss and buttery flavor.
How to Serve Classic Kentucky Butter Cake with Vanilla Rum Syrup Recipe
Garnishes
A dusting of powdered sugar or a scattering of toasted pecans enhances the cake’s Southern charm while adding a delightful crunch. Fresh berries or a dollop of whipped cream can bring a refreshing contrast to the richness of the syrup-soaked cake.
Side Dishes
Pair this cake with a scoop of vanilla bean ice cream or a simple fruit compote to balance the buttery sweetness. A hot coffee or spiced tea serves as a perfect beverage companion that complements the rum and vanilla notes beautifully.
Creative Ways to Present
Slice and serve the cake on a rustic wooden board for a cozy feel at family gatherings, or cut it into smaller squares and arrange on a festive platter for parties. Drizzling additional warm vanilla rum syrup on individual servings amps up the indulgence factor and presentation appeal.
Make Ahead and Storage
Storing Leftovers
Wrap leftover cake tightly in plastic wrap or store in an airtight container at room temperature for up to three days to maintain its moist texture and flavor.
Freezing
The cake freezes beautifully. Wrap it securely in plastic wrap and aluminum foil, then freeze for up to two months. Thaw overnight in the refrigerator before serving.
Reheating
Gently warm slices in the microwave for 15 to 20 seconds or in a low oven until just heated through. Brush with some warmed leftover syrup to refresh the moistness and boost the delicious vanilla rum aroma.
FAQs
Can I use regular rum instead of rum extract?
Yes, but use less since rum extract is more concentrated. About one tablespoon of regular rum should suffice and add a lovely authentic flavor.
Is there an alternative to buttermilk?
You can substitute buttermilk with a mixture of milk and lemon juice or vinegar if needed—let it sit for a few minutes before adding to mimic that tangy acidity.
Do I need to toast the pecans before adding them as garnish?
Toasting pecans enhances their flavor and crunch, but it’s optional. Raw pecans work fine if you prefer their softer texture.
Can I make this cake gluten-free?
You can try using a gluten-free flour blend, but results may vary. The classic texture relies on all-purpose flour’s gluten content for structure.
How long does the syrup keep?
Keep any leftover syrup refrigerated in a sealed container for up to two weeks. Warm gently before brushing on the cake.
Final Thoughts
There’s something truly magical about the Classic Kentucky Butter Cake with Vanilla Rum Syrup Recipe—it’s more than just dessert, it’s a celebration of Southern hospitality and comforting flavors that everyone will adore. I can’t recommend it enough for your next family gathering or special treat. Go ahead and treat yourself to this luscious, buttery wonder—you won’t regret a single bite!
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Classic Kentucky Butter Cake with Vanilla Rum Syrup Recipe
- Prep Time: 20 minutes
- Cook Time: 1 hour 20 minutes
- Total Time: 1 hour 40 minutes
- Yield: 10 servings 1x
- Category: Baking
- Method: Baking
- Cuisine: American
Description
Classic Kentucky Butter Cake with Vanilla Rum Syrup is a moist, old-fashioned bundt cake soaked in a warm and flavorful vanilla rum butter syrup, creating a rich and tender dessert perfect for any occasion.
Ingredients
CAKE
- 3 cups all-purpose flour
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 16 tablespoons unsalted butter (2 sticks), room temperature
- 1/2 cup butter-flavored shortening
- 3 cups granulated sugar
- 5 eggs, room temperature
- 2 teaspoons vanilla extract
- 1/4 teaspoon rum extract
- 1 cup buttermilk
BUTTER SYRUP
- 12 tablespoons unsalted butter (1 ½ sticks)
- 1½ cups granulated sugar
- 1/3 cup water
- 1 teaspoon vanilla extract
- 1/2 teaspoon rum extract
Instructions
- Preheat and Prepare Pan: Preheat oven to 325°F. Grease and flour a bundt pan thoroughly and set aside to ensure the cake releases easily after baking.
- Mix Dry Ingredients: In a large bowl, whisk together the all-purpose flour, baking powder, and salt until evenly combined. Set aside.
- Cream Butter and Shortening: In a separate large bowl, cream the unsalted butter and butter-flavored shortening on low speed until well combined and smooth.
- Add Eggs and Sugar Alternately: Alternately add the eggs and granulated sugar to the creamed mixture, mixing briefly after each addition until the batter becomes fluffy and well incorporated.
- Add Extracts: Mix in the vanilla and rum extracts to the batter, enhancing the flavor profile of the cake.
- Combine Wet and Dry Ingredients: Alternate adding the dry ingredient mixture and buttermilk into the wet ingredients. Mix gently after each addition until the batter is combined and fluffy, avoiding overmixing.
- Fill the Pan: Spoon the batter into the prepared bundt pan. Tap and shake the pan gently to release air bubbles and level the surface of the batter for even baking.
- Bake: Bake on the middle rack for 1 hour and 15-20 minutes, or until a cake tester inserted into the center comes out clean or with moist crumbs attached.
- Poke Holes: Remove the cake from the oven and carefully poke holes into it using a skewer or toothpick — avoid piercing all the way through to the top to allow the syrup to soak in without ruining the structure.
- Make Butter Syrup: In a saucepan over medium-low heat, melt the 12 tablespoons of unsalted butter. Add the sugar and water, stirring until the sugar dissolves. Continue stirring until the mixture becomes foamy and thickens to the consistency of a loose syrup. Do not let it boil. Remove from heat and stir in vanilla and rum extracts.
- Add Syrup to Cake: Spoon most of the warm butter syrup over the cake, allowing it to seep down into the holes. Reserve about 1/4 to 1/2 cup of the syrup for later.
- Rest the Cake: Let the cake sit for about 10 minutes until the syrup is no longer sticky. Be careful not to leave it too long to prevent sticking in the pan.
- Remove from Pan and Cool: Carefully invert the cake out of the pan onto a serving plate. Allow it to cool and the syrup to fully absorb for about an hour.
- Reheat Syrup and Brush Cake: Reheat the reserved syrup and brush it evenly over the outside of the cooled cake to add extra moisture and shine.
- Serve: Serve the cake at room temperature. For best flavor and texture, see tips for serving the next day provided in the original recipe.
Notes
- Use room temperature eggs and butter for better batter consistency and moisture.
- Do not overmix the batter to keep the cake tender.
- Make sure to poke holes carefully without piercing the top layer of the cake to retain structure.
- Let the syrup cool slightly before pouring so it absorbs evenly without melting the cake too much.
- Reheating and brushing additional syrup on the cake enhances flavor and moistness even after cooling.
- The cake is best enjoyed the day after baking once flavors meld and syrup is fully absorbed.
- Store leftover cake covered at room temperature or wrapped in foil to maintain moisture.

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