Lemon-elderflower cupcakes

Ingredients

• 1 1/2 cups all-purpose flour
• 1 tsp baking powder
• 1/2 tsp salt
• 1/2 cup unsalted butter , at room temperature
• 1 cup granulated sugar
• 1 tbsp lemon zest
• 2 eggs
• 2 tbsp elderflower syrup
• 2/3 cup 2% milk

Icing

• 1 cup unsalted butter , at room temperature
• 2 1/4 cups icing sugar
• 1/4 cup elderflower syrup
• 2 tbsp lemon juice