| Preparation | Resting | Cooking | Start to finish | 
|---|---|---|---|
| 40 min. | 20 min. | 45 min. | 1 hour 45 min. | 
| 1 | Put 150 g  caster sugar into a mixer bowl. Grate the zest of 1 lemon and 1 lime into the bowl and mix well. Note: for maximum flavour, this mixture can be prepared the day before and left in the fridge overnight, covered with plastic film. |  | 
| 2 | Preheat the oven to 340°F (170°C). Sieve together 200 g flour and 3 g baking powder, then add 3 g salt. |  | 
| 3 | Start the mixer to whisk together the sugar and zest, mix well. Gradually add 150 g egg after lightly beating with a whisk. |  | 
| 4 | Increase the mixer speed and leave the mixture to cream and aerate. |  | 
| 5 | Gradually add 50 g liquid cream and 10 g rum... |  | 
| 6 | ...then 90 g noisette butter. |  | 
| 7 | Finish by gently folding in the flour+baking powder+salt mixture a little at a time with a soft spatula. |  | 
| 8 | Divide the cake batter between small tins or moulds about 5 x 2 x 2 inches (12 x 6 x 6 cm). Note: As always with cakes, if you want a nice opening on top when baking, try this very effective trick. |  | 
| 9 | Bake for about 45 minutes. |  | 
| 10 | Soak the cakes with 150 ml citrus syrup while they are still hot. |  | 
| 11 | LEave to finish cooling on a wire rack. |  | 
