01 - Heat chocolate in a microwave-safe bowl in 20-second intervals, stirring thoroughly between each until fully melted and smooth.
02 - Brush melted chocolate evenly and thickly inside silicone half-sphere molds approximately 2.5 inches in diameter.
03 - Refrigerate molds for 10 minutes to set. Apply a second chocolate coat if necessary for sturdiness, then chill for an additional 10 minutes.
04 - Gently remove chocolate shells from molds, ensuring they remain intact.
05 - Fill half of the shells with 1 tablespoon each of hot cocoa mix and mini marshmallows, plus 1/2 tablespoon crushed peppermint candies per shell.
06 - Warm a plate briefly in the microwave. Press the rim of an empty shell onto the warm plate to slightly melt the edge, then carefully seal it onto a filled shell. Repeat for all halves.
07 - Drizzle melted white chocolate over assembled bombs and sprinkle with extra crushed peppermint. Let set completely before serving.
08 - Place one bomb in a mug, pour 8 to 10 fluid ounces of hot milk over it, and stir until fully dissolved for a rich peppermint hot chocolate.