Blue Cornmeal Pancakes With Blueberry Butter

Name: Blue Cornmeal Pancakes With Blueberry Butter
Ingredients: ½ cup (1 stick) unsalted butter, room temperature; ¼ cup fresh blueberries, washed and thoroughly dried; 2 teaspoons blueberry preserves; ¼ teaspoon ground coriander; Pinch of kosher salt; 1½ cups blue cornmeal; ¼ cup all-purpose flour; 1 tablespoon sugar; 1½ teaspoons baking powder; ½ teaspoon baking soda; ¼ teaspoon kosher salt; 2 large eggs, lightly beaten; 1½ cups buttermilk; ¼ cup canola or grapeseed oil; Nonstick cooking spray; Maple syrup