01 -
In a medium bowl, whisk the flour, cocoa powder, baking powder, and salt until the cocoa is evenly blended. Set aside.
02 -
Beat the butter, brown sugar, and granulated sugar on medium-high speed until creamy, about 2 minutes. Beat in the egg yolks and vanilla until lighter and smooth.
03 -
Add the dry ingredients to the butter mixture and mix on low speed just until no dry streaks remain. The dough will be thick and soft.
04 -
Scoop 1 tablespoon portions, roll into balls, and place on parchment-lined baking sheets. Press a deep well into each ball with a 1/4 teaspoon measuring spoon, then chill for 45 minutes.
05 -
Heat the oven to 350 degrees F. Bake the chilled cookies for 9-11 minutes, until the edges are set. Re-press the centers while hot, then cool on the pan for 5 minutes before moving to a rack.
06 -
Place chopped chocolate in a heatproof bowl. Heat the cream until steaming and just bubbling at the edges, pour it over the chocolate, and let stand for 1 minute. Stir until smooth, then stir in cherry preserves.
07 -
Spoon about 1 teaspoon ganache into each cooled cookie. Chill for 10-15 minutes, or let stand at cool room temperature until the ganache is softly set.