Kue Pound Blueberry

Bahan-bahan (12 porsi)

• 1 cup unsalted butter (softened)
• 2 cups fine sugar
• 4 large eggs
• 1 teaspoon vanilla extract
• 3 cups all-purpose flour (divided)
• ½ teaspoon salt
• 1 teaspoon baking powder
• 1 cups fresh blueberries