Raspberry yogurt cake

Name: Raspberry yogurt cake
Prep time: 15 mins
Cook time: 35 mins
Yield: 10-12
Ingredients: 125g unsalted butter, plus extra for greasing; 225g caster sugar; Finely grated zest of 2 unwaxed lemons; 1/2tsp vanilla extract; 2 large eggs, at room temperature, lightly beaten; 300g plain flour, sifted; 2tsp baking powder; 115g natural yogurt; 200g raspberries; 150g icing sugar, sifted; 2tbsp lemon juice; About 10 raspberries