blueberry boy bait

INGREDIENTS

• 2 cups plus 1 teaspoon all-purpose flour
• 1 tablespoon baking powder
• 1 teaspoon table salt
• 16 tablespoons unsalted butter (2 sticks), softened
• 3/4 cup packed light brown sugar
• 1/2 cup granulated sugar
• 3 large eggs
• 1 cup whole milk (though buttermilk, which was all I had on hand, worked just great)
• 1/2 cup blueberries, fresh or frozen (if frozen, do not defrost first as it tends to muddle in the batter)
• 1/2 cup blueberries, fresh or frozen (do not defrost)
• 1/4 cup granulated sugar
• 1/2 teaspoon ground cinnamon