My boys demand these from me when I visit.
Melting chocolate slowly in the microwave at 15-second intervals prevents scorching the cocoa solids. Once incorporated into the butter and sugar base, the exceptionally sticky dough requires a strict one-hour freeze or an overnight refrigerator rest. Skipping this crucial temperature drop yields a batter that cannot be rolled into balls without dissolving against your palms. If the dough warms up mid-rolling, return it to the freezer until firm.
Rolled confections rely on a specific sequencing to achieve their signature crinkled surface. Each formed ball receives a preliminary pass through granulated sugar followed by a heavy blanket of confectioners' sugar. The initial layer of coarse crystals draws out moisture during baking, while the powdery exterior creates the contrasting white-and-dark fissure pattern. Space the portions two inches apart on parchment paper to allow proper lateral spread.
Bake these items at 350 degrees for precisely ten to twelve minutes, removing them promptly when the edges set while the centers remain soft. Transfer the pans to wire racks after five minutes to halt residual cooking. This formulation yields twenty-four standard portions, though scaling the batch down requires halving all measurements proportionally, noting that single eggs are easily divided by whisking them first and weighing half the resulting liquid.