|  blue velvet sponge from epicurious.com | 
| 85g unsalted butter | 
softened | 
  | 
cream until light and fluffy  | 
Grease, line and lightly flour two tins, 15 cm diameter and 8 cm high. Bake in a moderate oven 30 minutes, or until just done. Leave to cool in tins for 1 hour. Remove from tins, and cool completely on a wire rack. Slice each cake into three layers. | 
| 251g sugar | 
 | 
| 1.5 large eggs | 
  | 
 beat in one at a time  | 
| 2 tablespoons blue colouring | 
whisk | 
  | 
 beat well  | 
| 1 1/2 tablespoons cocoa | 
| 3/4 teaspoon vanilla extract | 
| 219g flour | 
sifted | 
  | 
 beat in flour and buttermilk alternately, in three batches; do not overmix  | 
| 3/4 teaspoon salt | 
mix | 
| 3/4 cup buttermilk | 
| 3/4 teaspoon cider vinegar | 
mix | 
  | 
 mix well | 
| 3/4 teaspoon bicarbonate of soda | 
|  orange sponge | 
| 85g unsalted butter | 
softened | 
cream until light and fluffy  | 
Grease, line and lightly flour two tins, 15 cm diameter and 8 cm high. Bake in a moderate oven 30 minutes, or until just done. Leave to cool in tins for 1 hour. Remove from tins, and cool completely on a wire rack. Slice each cake into three layers. | 
| 251g sugar | 
 | 
| 4 oranges' rind | 
 | 
| 1.5 large eggs | 
  | 
 beat in one at a time  | 
| 3/4 teaspoon vanilla extract | 
  | 
 beat well  | 
| 219g flour | 
sifted | 
  | 
 beat in flour and buttermilk alternately, in three batches; do not overmix  | 
| 3/4 teaspoon salt | 
mix | 
| 3/4 cup buttermilk | 
| 3/4 teaspoon cider vinegar | 
mix | 
  | 
 mix well | 
| 3/4 teaspoon bicarbonate of soda | 
|  filling from epicurious.com | 
| 450g mascarpone | 
 | 
beat until fluffy  | 
| 227g ricotta | 
 | 
| 341g unsalted butter | 
softened | 
| 1.13 kg icing sugar | 
sifted | 
  | 
 beat in  | 
| 4 tablespoons sour cream | 
  | 
 beat in | 
| 2 teaspoons vanilla essence | 
| 1 cup blueberry jam | 
mix | 
| 1/2 cup hot water | 
|  rice krispy legs | 
| 42g butter | 
  | 
melt  | 
Press mixture into two rough leg shapes, on a sheet of baking parchment. Leave to set overnight, or longer. Freeze for 30 minutes, then carve into leg shapes. | 
| 284g marshmallows | 
  | 
 stir over low heat until completely melted  | 
| 6 cups rice krispies | 
  | 
 stir well | 
|  decoration | 
| 500g fondant | 
 | 
| blue food colouring | 
 | 
| silver food colouring | 
 |