Preheat your oven to 160 degrees Celsius (fan-forced). Line a large loaf tin with baking paper and set aside until needed.
Place the softened butter and sugar into your Thermomix bowl and mix 30 seconds, Speed 5 until pale and creamy.
Add the eggs and vanilla extract and and mix for 30 seconds, Speed 5.
Add the remainder of your ingredients and mix for 10 seconds, Speed 4 or until your mixture is smooth and well combined. Mix for a further 5 - 10 seconds on Speed 4 if necessary.
Pour the mixture into your prepared loaf tin and place in the preheated oven to bake for 45 - 50 minutes, or until the cake is cooked through when tested with a skewer.
Carefully remove the cake from the oven and let it cool in the tin for 10 minutes before transferring to a wire rack to cool completely.
For The Icing
Prepare the lemon icing by sifting the icing sugar into a bowl and mixing it with the lemon juice until smooth.
Use a spatula or a butter knife to spread the icing over the completely cooled °cake.
Notes
If you are using a conventional oven, increase the temperature by 10-20 degrees Celsius, and keep a close eye on the cake towards the end of the baking time.
This cake is freezer friendly, wrap in baking paper and foil and store in the fridge for up to three months.
You can freeze this cake either iced or un-iced.
This cake can be baked in a round or ring tin, please note the cooking time will vary.