Preheat the oven to 180°C. Grease and line a 23cm spring-base tin with silicone paper. Mix all the ingredients for the base together and evenly spread on the base of the tin. Place in the oven for 15 ...

Preheat your oven to 180 degrees and line a 9-inch round spring-form or loose-base tin with parchment. Beat the butter and sugar until light and fluffy. Mix the egg, buttermilk and vanilla and combine ...