Blueberry-Drop Biscuit Cobbler

INGREDIENTS

• 1 1/2 cups plus 3 tablespoons all-purpose flour
• 3 tablespoons plus 1 cup sugar
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon kosher salt
• 6 tablespoons (3/4 stick) chilled unsalted butter, cut into 1/2" pieces
• 1/2 cup plus 1 tablespoon crème fraîche or sour cream
• 6 cups fresh blueberries (about 2 pounds)
• 2 tablespoons fresh lemon juice
• 1 tablespoon finely grated lemon zest