Original recipe from Martha Stewart here
2 cups unbleached all-purpose flour
2 teaspoons baking powder
1/4 teaspoon baking soda
1/4 cup granulated sugar
1/2 teaspoon kosher salt
1 stick cold unsalted butter
1/2 cup dried currants
2 teaspoons caraway seeds
1 cup cold buttermilk
1 cup confectioners’ sugar
2 tablespoons whole milk
1/4 teaspoon grated orange zest
Preheat oven to 425 degrees. Whisk together flour, baking powder, baking soda, granulated sugar, and salt.
Cut butter into small pieces; work into flour mixture with your fingers or a pastry cutter until dough resembles coarse meal. Add currants, caraway seeds, and buttermilk; stir until just combined.
Using an ice cream scoop, scoop dough onto a parchment-lined baking sheet, spaced 3 inches apart. Bake until bottoms are golden, 15 to 20 minutes. Let cool completely on sheet.
Meanwhile, combine confectioners’ sugar, milk, and orange zest. Drizzle over biscuits; serve.