Conventional Method

For The Cake

• Preheat oven to 180° celsius (fan-forced). Grease and line a 30cm x 22cm rectangular baking tin with baking paper. Set aside until needed.
• Place the butter, caster sugar, brown sugar and vanilla extract into a bowl. Beat with a stand mixer or handheld beaters until pale and fluffy.
• Add the eggs one at a time, beating in between each addition.
• Add the sour cream, mashed banana and poppy seeds and fold through.
• Sift over the plain flour and baking powder and fold through until combined.
• Pour the mixture into the prepared baking tin nd bake for 40 minutes, or until cooked through.
• Allow the cake to cool in the baking tin for 30 minutes before turning onto a wire rack to cool completely.

For The Frosting

• To make the vanilla frosting, sift the icing mixture into a bowl. Add the butter, vanilla extract and 1 tbs milk and beat with a stand mixer or handheld beaters until creamy.
• Add the remaining 1 tbs milk (if needed) and beat until pale and fluffy.
• Spread frosting over cooled cake and cut into slices.

Thermomix Method

For The Cake

• Preheat oven to 180° celsius (fan-forced). Grease and line a 30cm x 22cm rectangular baking tin with baking paper. Set aside until needed.
• Place the plain flour and baking powder into the Thermomix bowl. Sift using 1 sec, Turbo Function, 5-10 times, then set aside in a separate bowl.
• Place the butter, caster sugar, brown sugar and vanilla extract into the Thermomix bowl. Cream for 30 seconds,Speed 4. Scrape down the sides of the bowl and repeat for a further 30 seconds.
• Reduce to Speed 2, and with the blades still turning, add the eggs one at at a time. Once combined, mix for 15 seconds, Speed 4.
• Add the sour cream and mashed banana and mix for 15 seconds, Speed 4.
• Add the plain flour, baking powder and poppy seeds and mix for 15 seconds, Speed 5.
• Pour the mixture into the prepared baking tin and bake for 40 minutes, or until cooked through.
• Allow the cake to cool in the baking tin for 30 minutes before turning onto a wire rack to cool completely.

For The Frosting

• To make the vanilla frosting, place the icing mixture into the Thermomix bowl. Sift using 1 sec, Turbo Function, 5 times. Add the butter, vanilla extract and 1 tbs milk and combine for 10 seconds, Speed 5.
• Scrape down the sides of the bowl and mix for a further 5 seconds, Speed 5, adding the 2nd tablespoon of milk if the frosting is too thick.
• Spread frosting over cooled cake and cut into slices.