Kue Mentega Blueberry

Bahan-bahan (6 porsi)

• 2 sticks unsalted butter (at room temperature)
• 7 oz (200g) all purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon garam
• 7 oz (200g) sugar
• 4 large eggs
• 4 tablespoons fresh milk
• 1 teaspoon esens vanila
• 6 oz (175g) fresh blueberries
• gula bubuk (untuk taburan, opsional)