Preheat oven to 400 degrees F. Lightly oil a large baking sheet or coat it with nonstick spray. Place cream cheese and butter in freezer to chill, about 10 minutes.Advertisement
Combine flour, brown sugar, baking powder, baking soda and salt in a large mixing bowl. Cut cream cheese and butter into flour mixture using a pastry blender or your fingers until it resembles coarse meal. Add currants and orange zest and toss to incorporate. Make a well in the flour mixture. Add 2/3 cup buttermilk, stirring with a fork until just combined.
Transfer dough to a well-floured surface and knead gently 7 or 8 times. Divide dough in half. With floured hands, pat each piece into a circle about 1/2 inch thick. With a floured knife, cut each circle into 8 wedges. Transfer to prepared baking sheet. Lightly brush tops with remaining 1 tablespoon buttermilk.
Bake scones for 12 to 15 minutes, or until golden and firm. Transfer to a wire rack to cool slightly. Serve warm.
Make Ahead Tip: Store well wrapped in the freezer for up to 1 week. Thaw at room temperature. Warm slightly before serving.
1 starch, 1/2 fat