1. Preheat the oven to 180°C. Remove the zest then juice the yuzu.
2. Mix the softened butter and sugar together, add the eggs, zest and yuzu juice.
3. Incorporate the baking flour to the mixture.
4. Butter a baking mold and cover with a thin layer of caster sugar.
5. Pour the batter into the mold without exceeding 2cm of height then bake from 15 to 20 minutes at 180°C.
Take the cake out of the mold and serve at room temperature.
Enjoy !