Lemon & Tarragon Olive Oil Cake

Ingredients

• 150 g - sugar
• 3 g - tarragon
• 1 u - lemon zest
• 2 u - egg
• 180 ml - olive oil
• 240 ml - buttermilk
• 1 b - lemon juice
• 0.5 t - salt
• 190 g - flour
• 1.5 t - baking powder
• 0.5 t - baking soda
• 100 g - water
• 100 g - sugar
• 100 g - icing sugar
• 3~5 b - heavy cream