Barefoot Contessas

• 1¾ cups all-purpose flour

• ¾ cups granulated sugar

• 2¼ teaspoon baking powder

• ½ teaspoon baking soda

• ½ teaspoon kosher salt

• 1 cup buttermilk, shaken

• 4 tablespoon unsalted butter, melted and cooled

• 1 Meyer lemon

• 1 large egg

• 6 oz. fresh blueberries

• ½ cup + 2 tablespoon all-purpose flour

• ¼ cup light brown sugar, lightly packed

• ½ teaspoon ground cinnamon

• ¼ teaspoon kosher salt

• 2 tablespoon cold unsalted butter