Banana Cake Recipe Singapore: Spiced Rum Streusel Hugs Ultra-Moist Layers

This Singaporean banana cake recipe delivers ultra-moist layers wrapped in a spiced rum streusel that tastes like a warm hug. 🌟 The secret lies in blending ripe bananas with coconut milk and condensed milk—a signature twist from Singapore's baking tradition. This cake isn't just dessert; it's a celebration of texture and flavor, where every bite reveals tender crumb and caramelized streusel perfection.

The magic begins with a simple yet foolproof method: ripe bananas mashed into the batter for natural sweetness, while coconut milk adds richness and moisture. A touch of cinnamon and nutmeg in the streusel layer brings warmth, while the rum infuses depth—though you can substitute with vanilla if preferred. The result? A cake that's foolproof for beginners but impressive enough for gatherings, with a golden crust and a crumb so tender it nearly melts.

What sets this apart is the balance—moist enough to cut cleanly, yet sturdy enough to hold its shape. The streusel doesn't just top the cake; it becomes part of the experience, crumbling into each bite with every layer. Whether served with a dollop of whipped cream or a dusting of powdered sugar, this recipe delivers comfort in every forkful. Ready to bake?

Perfect for birthdays, potlucks, or a cozy weekend treat, this cake keeps well for days, making it ideal for meal prep. The flavors only deepen as it sits, so leftovers taste even better the next day. Let's get started on creating your own Singaporean-inspired masterpiece.

Ingredients for banana cake recipe singapore

Moist layers and caramelized streusel—this Singaporean banana cake needs just 15 ingredients for a showstopper dessert.

The bananas are non-negotiable—ripe with brown speckles ensures natural sweetness without extra sugar. Trader Joe's or Costco often have perfect ones in their produce section. Coconut milk matters too; full-fat canned versions like Thai Kitchen give the best texture. For the condensed milk, Dutch-processed brands like Carnation melt smoothly. The rum adds depth but can be swapped for vanilla if needed—just reduce other liquids by 1 tbsp to balance moisture.

No spiced rum? Vanilla extract plus 1 tsp extra cinnamon works beautifully. For the streusel, blending oats into flour creates a finer crumb—no food processor needed, just pulse a few times in a blender. The brown sugar in the streusel should be packed firmly (tap the measuring cup to settle). Salted butter in the streusel adds flavor, but if you only have unsalted, add a pinch of sea salt to the mix. Fresh nutmeg makes a difference here—pre-ground loses potency quickly, so grate your own if possible.

Banana batter keeps 2 days in the fridge—stir before using. The streusel can be prepped 1 day ahead and stored separately. Once baked, this cake improves with time—2-3 days at room temp lets flavors meld perfectly. For longer storage, wrap tightly in plastic and freeze for up to 3 months. Reheat slices in a 350°F oven for 5 minutes to restore freshness.

Step-by-step instructions for Singapore-style banana cake

Here's how to create a perfectly moist cake with a signature rum-streusel topping.

Mash the 3 medium ripe bananas until completely smooth with no lumps remaining. In a large mixing bowl, combine the mashed bananas with the 1 can (13.5 oz) coconut milk and 0.5 cup sweetened condensed milk. Whisk vigorously for 2 minutes until fully blended and slightly thickened.

This combination creates the signature ultra-moist texture that sets this cake apart. The coconut milk adds richness while the condensed milk ensures that signature Singaporean moisture. Let the mixture sit for 5 minutes while you prepare the dry ingredients—this gives the bananas time to release their natural starches.

In a separate bowl, sift together the 2 cups all-purpose flour, 1.5 cups granulated sugar, 1 tsp baking powder, 1 tsp ground cinnamon, and 0.25 tsp ground nutmeg. Add the 2 whole large eggs (room temperature) and 0.5 cup softened unsalted butter to the banana mixture.

Gradually fold in the dry ingredients using a spatula, mixing just until combined—do not overmix. The batter should be thick but pourable. Add the 1 tsp vanilla extract and 2 tbsp spiced rum (or vanilla substitute) and mix gently. The rum adds depth of flavor that's characteristic of Singapore-style banana cakes.

In a food processor, blend the 0.75 cup old-fashioned oats until they resemble coarse flour. In a small bowl, combine the oat flour with 0.5 cup packed brown sugar and 0.25 cup cold cubed salted butter. Use your fingers to work the mixture until it forms crumbly clusters with some larger pieces remaining.

This streusel should be moist but not wet—it should hold together when pressed but still crumble easily. The cold butter ensures it won't melt prematurely during baking, creating that perfect textural contrast between the soft cake and crunchy topping.

Preheat your oven to 350°F. Grease an 8x8-inch baking pan or line it with parchment paper. Pour half of the banana batter into the prepared pan, spreading it evenly. Sprinkle half of the streusel mixture over the batter, pressing down gently to ensure good contact.

Add the remaining batter, then top with the remaining streusel. Bake for 40-45 minutes until the top is golden brown and a toothpick inserted in the center comes out clean. The cake should spring back slightly when pressed gently in the center.

Remove the cake from the oven and let it cool in the pan for 10 minutes. Transfer to a wire rack to cool completely. The cake will be moist but firm—this resting period allows the flavors to meld and the streusel to set properly.

For best results, serve at room temperature. The combination of the ultra-moist banana layers and the spiced rum streusel creates a perfect balance of textures and flavors that's become iconic in Singapore. Each slice should be tender yet slightly dense, with that signature caramelized streusel on top.

Creative variations of banana cake recipe singapore

Pandan-Inspired Twist

For a true Singaporean touch, infuse the batter with ½ tsp pandan extract (found in Asian grocery stores) or 1 tbsp pandan paste. This adds that signature floral aroma and vibrant green hue without altering the cake's moist texture. I like to blend 1 tbsp fresh pandan leaves (finely chopped) with the wet ingredients for an even more authentic flavor. 🌿

Coconut Milk Variations

Swap the canned coconut milk for ½ cup coconut cream (the thick part from a can) to create a richer, denser cake. For a lighter version, use ½ cup coconut yogurt mixed with ½ cup coconut milk. These variations work beautifully with the same batter ratios but adjust baking time by 5-10 minutes—watch closely for doneness. The coconut cream version has a luxurious, almost custard-like texture.

Spiced Streusel Upgrades

Boost the streusel with ½ tsp cardamom and ¼ tsp black pepper for a sophisticated twist. Toast the oats first in a dry pan over medium heat for 3 minutes to deepen their nutty flavor. For a tropical fusion, fold in ¼ cup shredded coconut into the streusel—this adds a delightful crunch and visual contrast. The cardamom adds warmth that pairs perfectly with the rum.

Chocolate Banana Fusion

Add ½ cup cocoa powder to the dry ingredients for a decadent chocolate-banana hybrid. Reduce the granulated sugar to 1 cup and add ½ cup chocolate chips to the batter. The streusel stays the same, but the cake develops a rich, fudgy texture. This variation is a crowd-pleaser for chocolate lovers while keeping the signature moistness. 🍫

Gluten-Free Adaptation

Replace the all-purpose flour with a 1:1 gluten-free baking blend (like Bob's Red Mill) and add 1 tbsp xanthan gum to maintain structure. Use ½ cup almond flour in addition to the gluten-free blend for extra moisture. The texture will be slightly denser but still ultra-moist. For the streusel, use ½ cup gluten-free rolled oats and ensure your oat flour is certified gluten-free. 🌾

Make-Ahead & Freezer Tips

This cake actually tastes better after 2-3 days at room temperature, making it perfect for meal prep. For freezing, wrap individual slices tightly in plastic wrap and store for up to 3 months. Thaw overnight in the fridge before reheating. I like to reheat slices in a 350°F oven for 5 minutes to restore the streusel's crispness—it's a game-changer for leftovers. ❄️

Frequently asked questions