Roti lemon berlapis kaca

Bahan-bahan (8 porsi)

• 2 cups plain flour / all-purpose flour ((Note 1 for GF))
• 4 tsp baking powder
• 1/8 tsp salt
• 1 cup plain yogurt (, at room temperature)
• 2 large eggs ((~55g/2oz each), at room temperature)
• 75 g / 5 tbsp unsalted butter (, melted and cooled)
• 1/4 cup vegetable or canola oil ((or other neutral flavoured oil))
• 2 tbsp lemon zest ((~2 large lemons))
• 1/4 cup lemon juice
• 1 1/4 cups caster sugar / superfine sugar ((sub normal/granulated sugar))
• 1/2 tsp vanilla extract
• 1 1/2 tsp lemon extract ( - sub 1 tbsp extra zest (Note 3))
• 1 cup soft icing sugar/powdered sugar (, sifted)
• 3 - 3 1/2 tsp+ lemon juice