2 tbsp undiluted elderflower cordial
100ml/3陆fl oz undiluted elderflower cordial
1 large lemon, zest only
3 tbsp lemon juice
100驳/3陆辞锄 rice flour (or plain flour if you don鈥檛 need this to be gluten-free)
1陆 tsp baking powder (gluten-free if necessary)
150驳/5陆辞锄 caster sugar
75驳/2戮辞锄 ground almonds
pinch of fine sea salt
175g/6oz soft unsalted butter, plus extra for greasing
double cream, to serve
3 large free-range eggs, at room temperature
50g/1戮oz full-fat Greek yoghurt