Blueberry Maple Tea Cake

INGREDIENTS

• 3/4 cup plus 2 tablespoons whole wheat pastry flour
• 3/4 cup whole wheat flour
• 1 1/2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon kosher salt
• 1/8 teaspoon ground cinnamon
• 2/3 cup real maple syrup (preferably Grade B)
• 1 large egg, lightly beaten
• 1/2 cup milk
• 6 tablespoons (3/4 stick) unsalted butter, melted
• 1 cup fresh blueberries
• 3 tablespoons real maple syrup
• 3 tablespoons unsalted butter
• Pinch sea salt or kosher salt
• 1/4 cup powdered sugar