Peel and grate carrot – spread on paper towel to absorb some moisture
Take zest and juice from orange
Blitz nuts in food processor
Sieve flour, spics and baking powder onto a plate, mix in nuts
Weigh egg and sugar into bowl and whisk until thick ‘trail test’
Using metal spoon, fold in vanilla essence, oil, zest from half orange
Gently fold in flour mixture
Gently fold in the carrots
Pour into tin and allow to level
Bake for about 15 mins
Place tea towel on work surface, lie a large piece of baking parchment on top and sprinkle over caster sugar
Carefully roll up cake and leave to cool for about 1 hour
Beat butter and cream cheese together, work in icing sugar
Gradually add remaining orange zest
Gradually add enough orange juice to allow you to spread the icing
Unroll cake, fill with cheese icing and roll up