Two 7-ounce bricks sharp white Cheddar, finely grated
Two 4-ounce jars pimentos, drained and diced
1/2 cup mayonnaise
1/4 cup chopped scallions
2 cups all-purpose flour, plus more for dusting
1 tablespoon baking powder
1/4 teaspoon kosher salt
4 tablespoons unsalted butter, cut into cubes and chilled, plus 1 tablespoon for the skillet
3/4 cup buttermilk, well shaken
1/4 cup finely diced country ham