3 tablespoons unsalted butter, divided
1/4 cup light brown sugar
2 medium peaches, peeled
1 ounce finely chopped crystallized ginger, approximately 3 tablespoons
2.5 ounces all-purpose flour, approximately 1/2 cup
1 teaspoon baking powder
1/8 teaspoon baking soda
1/8 teaspoon kosher salt
1/3 cup granulated sugar
1/2 cup buttermilk, room temperature
1/2 teaspoon vanilla extract
Whipped cream or ice cream, for serving, optional