Chocolate Strawberry Shortcakes

To make filling: Line a sieve with cheesecloth and set it over a bowl. (Alternatively, use a coffee filter lined with filter paper.) Spoon in yogurt and let drain in the refrigerator for 30 to 60 minutes. Toss strawberries with 3 tablespoons sugar in a bowl. Let stand at room temperature, stirring occasionally, until a syrup has formed, 20 to 30 minutes.

To make biscuits: Position rack in the center of the oven; preheat to 400 degrees F. Line a baking sheet with parchment paper or coat it with cooking spray. Whisk together flour, cocoa, 1/3 cup sugar, baking powder, baking soda and salt in a medium bowl. Cut butter and cream cheese into the flour mixture with a pastry cutter or your fingertips until crumbly. Make a well in the center and add buttermilk, stirring with a fork until evenly moistened. Drop 4 mounds of batter, about 2 inches apart, onto the prepared baking sheet. Shape the mounds into 3-inch circles and bake until the tops spring back when touched lightly, 10 to 12 minutes. Transfer biscuits to a rack and let cool slightly.

To assemble shortcakes: Slice the biscuits in half crosswise with a serrated knife. Set bottoms on dessert plates. Spoon the strawberries and syrup over the biscuits and add a dollop of the drained yogurt. Top with the biscuit tops, dust with confectioners' sugar and serve.