For a dairy-free version replace the mascarpone icing with an orange honey drizzle: boil the juice and grated zest of an orange with 3 tablespoons of Rowse Runny Honey for 2-3 minutes. Prick the cake all over while still warm in the tin and pour the honey mixture on top. Leave to cool completely.
NOTE: Greek honey and Acacia honey work well in the icing
Top tip: Tick off the items you've already got, so you can quickly see what's left to buy
For the cake, heat the oven to 180C/160C fan/Gas 4. Line a 20cm round cake tin, at least 5cm deep, with baking parchment.
Mix together the flours, sugar and baking powder in a mixing bowl. In a jug whisk together the eggs, oil, honey, orange juice and vanilla then pour into the flour mixture along with the grated carrot and walnuts. Stir to combine, but don’t overmix.
Spoon the batter into the tin, gently smooth out the surface and bake in the oven for 40 – 50 minutes or until firm to the touch and a sharp knife inserted in the middle comes out clean. Leave to cool in the tin.
For the icing, beat together the mascarpone, honey and vanilla. Remove the cool cake from the tin and spread the icing on top. Decorate with orange zest if using.