Banana Butter Cake Recipe Singapore: Cardamom-Spiced Moistness With Toasted Butter Frosting

This banana butter cake recipe Singapore brings warm, cardamom-spiced moistness that’s become a beloved staple across the island. 🌟 The secret lies in the toasted butter frosting—a signature touch that transforms ordinary banana cake into something truly special. What makes this version stand out is the subtle warmth of cardamom, a spice deeply rooted in Singaporean baking traditions, which adds depth without overpowering the natural sweetness of ripe bananas.

The cake’s texture is what sets it apart—moist and tender, with a delicate crumb that holds up perfectly to the rich, velvety frosting. Unlike traditional Western banana cakes, this recipe incorporates a touch of coconut milk for extra richness, a nod to Singapore’s tropical influences. The frosting, made with toasted butter and a hint of vanilla, melts into every bite, creating a harmonious balance of flavors that’s both comforting and sophisticated.

Perfect for celebrations or a cozy afternoon treat, this cake combines the best of Singapore’s baking heritage with modern techniques for foolproof results. The cardamom-infused batter ensures a fragrant aroma that fills your kitchen, while the toasted butter frosting adds a luxurious finish. Whether you’re baking for a special occasion or simply craving a slice of nostalgia, this recipe delivers a dessert that’s as impressive to serve as it is delicious to eat.

Ready to bake? The recipe includes step-by-step instructions for achieving the ideal texture and flavor, along with tips for customizing it to your taste. Let’s get started on creating a cake that’s sure to become a family favorite.

Ingredients for banana butter cake recipe singapore

Ripe bananas, toasted butter, and cardamom—Singapore’s secret to moist, fragrant cake perfection.

Cardamom is non-negotiable here—Penzeys or local Asian markets have the best ground variety. Look for pods that are plump and aromatic; grinding them fresh makes all the difference. The bananas? Too firm, and the cake will be dense—aim for that squishy, slightly mushy texture. Coconut milk adds richness without overpowering; full-fat canned (like Aroy-D or Thai Kitchen brands) works best. For the butter, toasting it in a dry pan until nutty and golden deepens the flavor—don’t skip this step. If you’re short on time, microwave it in 20-second bursts until just melted, then cool completely before using.

No cardamom pods? Substitute with 1 tsp cinnamon + 0.5 tsp allspice, but the flavor won’t be identical. Out of coconut milk? Heavy cream or extra butter works, though the texture will shift slightly. For the frosting, powdered sugar is a must—Domino or C&H brands sift perfectly. If your frosting seems too soft, chill it 15 minutes before spreading. The cake itself can handle substitutions like applesauce for 0.5 cup of butter if you’re watching fat, though it’ll be slightly less rich. And if you’re baking in humidity? Brush the cake layers with simple syrup (equal parts sugar and water) before frosting to keep it moist.

This cake keeps beautifully—3 days at room temperature covered loosely, or 1 week refrigerated in an airtight container. The frosting softens in heat, so store it separately if your kitchen runs warm. For make-ahead baking, assemble the cake (without frosting) up to 2 days ahead; wrap tightly in plastic. The frosting can be made 1 day ahead and stored in the fridge—just re-whip before using. Freeze unfrosted layers for up to 3 months—thaw overnight in the fridge before assembling. And if you’re feeling fancy, dust the finished cake with a cardamom-sugar mix (1 tsp cardamom + 2 tbsp sugar) for that extra Singaporean touch.

Step-by-step instructions for banana butter cake with toasted butter frosting

Here's how to bake Singapore-style banana butter cake with ultra-moist crumb and rich toasted butter frosting.

First, spread the 1 cup unsalted butter on a parchment-lined baking sheet and toast in a 350°F oven for 10-12 minutes until it turns golden brown with nutty aroma. Let it cool slightly while you mash the 3 whole ripe bananas—they should yield about 1.5 cups of smooth purée. I like to press them through a fine-mesh sieve to remove any fiber for an extra-smooth texture.

Here's the thing—this toasting step is non-negotiable. The toasted butter gives that signature Singaporean flavor depth, and the banana purée forms the cake's moist foundation. Don't skip either, or you'll miss out on the authentic taste and texture.

In a stand mixer fitted with the paddle attachment, beat the cooled toasted butter with the 2 cups granulated sugar and 0.5 cup light brown sugar on medium-high speed for 3-4 minutes until light and fluffy. The mixture should nearly triple in volume and become pale. Add the 2 whole large eggs one at a time, mixing well after each addition.

This creaming process incorporates air that creates the cake's signature tender crumb. I press down gently on the butter mixture during the first minute—this prevents it from curdling when the eggs hit. You'll know it's ready when you drag a spoon through the mixture and it leaves a clear trail that holds its shape.

In a separate bowl, whisk together the 2 cups all-purpose flour, 1 tsp baking soda, 1.5 tsp ground cardamom, and 0.5 tsp salt. Sift the flour mixture directly into the wet ingredients while mixing on low speed for 30 seconds until just combined. Add the banana purée, 1 tbsp vanilla extract, and 0.5 cup coconut milk, mixing on low speed for another 30 seconds until smooth.

Don't overmix—you should still see a few flour streaks. The cardamom adds that signature Singaporean warmth, while the coconut milk keeps the cake extra moist. Here's a pro tip: If the batter looks too thick, add 1-2 tablespoons of milk to loosen it slightly.

Pour the batter into two 9-inch round cake pans lined with parchment paper. Bake in a 350°F oven for 25-30 minutes, or until a toothpick inserted in the center comes out clean and the edges are golden brown. Rotate the pans halfway through baking for even browning.

I press down gently on the center of each cake—if it springs back slowly, it's done. If it's still jiggly, bake for another 2-3 minutes. Let the cakes cool in the pans for 10 minutes before transferring to a wire rack to cool completely. This resting period prevents crumbling when you frost.

Beat the 1 cup toasted butter (cooled to room temperature) with the 3 cups powdered sugar and 0.5 tsp ground vanilla bean on medium speed for 3-4 minutes until light and fluffy. Add 1-2 tablespoons of milk if needed to reach a smooth, spreadable consistency. Frost the cooled cake layers and top with a dusting of powdered sugar.

This frosting is where the magic happens—the toasted butter flavor ties everything together. I like to pipe decorative swirls on top, but even a simple spread looks gorgeous. The key is to frost when the cake is completely cool, or the butter will melt and make a mess.

Troubleshooting this dish

Cake Too Dense

If your cake turns out dense, it’s likely from overmixing the batter or using underripe bananas. I’ve found that pressing ripe bananas through a fine-mesh sieve removes excess fiber, keeping the texture light. Also,

Frosting Too Soft

The toasted butter frosting can turn out too soft if the butter isn’t fully cooled before whipping. I always let it sit at room temperature for 30 minutes before starting. If the frosting is still too soft, chill the bowl in the fridge for 10 minutes while whipping. For extra stability, add 1 extra tablespoon of powdered sugar or 1 teaspoon of cornstarch to thicken it. Avoid over-whipping, or the frosting may become grainy.

Cardamom Flavor Missing

If your cake lacks that signature cardamom warmth, it could be from using old or low-quality ground cardamom. I recommend buying whole pods and grinding them fresh—Penzeys or local Asian markets carry the best quality. If you don’t have pods, use 1 teaspoon of cinnamon + 0.5 teaspoon of allspice as a substitute, but the flavor won’t be identical. Toast the cardamom seeds lightly in a dry pan for 1 minute before grinding to deepen the aroma. Add the ground cardamom to the dry ingredients for even distribution. 🌿

Cake Sticking to Pan

Cakes often stick if the pans aren’t properly greased or lined. I always use parchment paper circles cut to fit the bottom of the pan, then grease the sides with butter or baking spray. For extra insurance, dust the parchment with flour or cornstarch before pouring the batter. If the cake still sticks, try baking it in glass pans—they heat more evenly and reduce sticking. Let the cake cool in the pan for 10 minutes before transferring to a rack to prevent crumbling.

Frosting Too Sweet

If the frosting tastes overly sweet, it’s likely because the powdered sugar wasn’t sifted properly, leading to clumps. Always sift the 3 cups powdered sugar before whipping to avoid graininess. To balance the sweetness, add 1 teaspoon of lemon juice or 0.5 teaspoon of vanilla bean paste to the frosting for a bright, complex flavor. You can also reduce the powdered sugar to 2.5 cups and adjust the consistency with a splash of milk. Taste as you go—this frosting should complement, not overpower, the cake’s natural sweetness.

Cake Not Rising

A cake that doesn’t rise properly usually means the baking soda was old or the oven temperature wasn’t accurate. I always double-check my oven with an oven thermometer—many ovens run 25°F hotter or cooler than the set temperature. Replace the baking soda with 1 teaspoon of baking powder if you suspect it’s expired. Make sure the eggs are at room temperature, as cold eggs can prevent proper leavening. Also, don’t overfill the pans—batter should reach about 2/3 full to allow room for rising. 🔥

Frequently asked questions