Jam Donut Cupcakes

Ingredients

• 3 tsp baking powder
• 2 large eggs
• 1/2 tsp fine salt
• 1/2 cup vegetable oil
• 1 tsp cinnamon powder
• 1/2 cup unsalted butter (softened)
• 1 cup caster sugar
• 2 tbsp Greek yoghurt (or sour cream)
• 1 tsp vanilla extract (vanilla bean paste)
• 1 1/4 cups caster sugar (superfine)
• 1 batch of fluffy vanilla buttercream frosting
• 3 1/2 cups plain flour (all-purpose)
• 1 1/2 cups full-cream milk (whole)
• 1 cup raspberry or strawberry jam