Blueberry-Lemon Buttermilk Bundt Cake

INGREDIENTS

• :
• 2½ cups + 2 tablespoons all-purpose flour, divided
• 2 teaspoons baking powder
• 1 teaspoon salt
• 1¾ cup granulated sugar
• Zest of 1 lemon
• 1 cup unsalted butter, at room temperature
• 3 eggs, at room temperature
• ½ teaspoon vanilla extract
• ¾ cup buttermilk
• 3 cups blueberries
• 2 cups powdered sugar
• 2 to 3 tablespoons milk
• 1 tablespoon unsalted butter, very soft