Fluffy Banana Cake

Soft, moist and fluffy banana sheet cake with caramel butterscotch buttercream

5 from 1 reviews

Soft, moist and fluffy banana sheet cake topped with a silky butterscotch buttercream. The perfect treat when you want something a little more than banana bread!



Banana Cake

  • 250g Milk (1 cup)
  • 20g Lemon juice (1 tbsp 1 tsp)
  • 115g Unsalted butter, room temperature (1/2 cup)
  • 130g Brown sugar (2/3 cup)
  • 140g White sugar (2/3 cup)
  • 2 Eggs
  • 250g Plain flour (2 cups)
  • 1 tsp Vanilla extract
  • Pinch of salt
  • 2 Ripe bananas. medium, mashed
  • 1 tsp Baking soda

Butterscotch Buttercream

  • 100g Brown sugar (1/2 cup)
  • 30g Thickened cream (2 tbsp)
  • 20g Unsalted butter (I), for caramel (1 1/2 tbsp)
  • 1/2 tsp Ground cinnamon
  • 200g Unsalted butter (II), softened, for buttercream (3/4 cup 2 tbsp)
  • Flaky salt, for finishing


Banana Cake

  1. Preheat oven to 160C/320F
  2. Line a 20 x 20cm (8 x 8 inch) brownie pan with baking paper
  3. Combine milk and lemon juice and set aside
  4. Beat butter and sugars for 5 minutes on medium speed until pale and fluffy
  5. Add eggs, salt, vanilla, baking soda, mix until combined
  6. Alternate adding flour and milk, starting and ending with flour
  7. Fold the mashed banana through the batter until combined
  8. Pour into the lined tin
  9. Bake for 45-55 mins, or until an inserted toothpick comes out clean
  10. Cool completely


  1. Combine brown sugar, cream, butter (I) and cinnamon in a small saucepan over medium-high heat
  2. Allow sugar and butter to melt, stirring occasionally
  3. Once dissolved allow butterscotch to boil for 3-5 minutes until thickened
  4. Remove and cool completely
  5. Once the butterscotch has cooled beat butter (II) until smooth 
  6. Add 100g (3.5oz) butterscotch (reserving the remaining for drizzling over the finished cake) and continue to beat on high speed for 8-10 minutes, the buttercream should be light and fluffy
  7. Reduce speed to low and beat for a further 3-4 minutes to remove any large air bubbles


  1. Swirl the butterscotch buttercream and remaining butterscotch over the cooled banana sheet cake
  2. Top with flaky salt and enjoy!


Keywords: banana, cake, caramel, butterscotch, buttercream, frosting, sheet cake, snack cake

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