Start by tempering the chocolate to prepare it for holding in your hot cocoa mixture. Add chocolate chips to a double boiler or glass bowl over a large pot with boiling water. Melt the chocolate chips and remove from heat. Monitor the temperature of the chocolate with a candy thermometer. Allow it to come down to 80°F (this can take up to 20 minutes). Then, put the chocolate back over the heat and bring it back up to 90°F. 3/4 cup chocolate chips (dark or semi-sweet)
Use a pastry brush to fill 12 chocolate molds, spreading on a thick layer of melted chocolate in each half-sphere, coating it as evenly as possible and ensuring the chocolate comes all the way up the sides. You should use up all of the melted chocolate.Place the molds in the refrigerator for 15-20 minutes to set. To a separate, small mixing bowl, add the sugar and cocoa powder and whisk to combine to make your hot cocoa mixture.
1/4 cup cocoa powder, 1/4 cup granulated sugar
Once the chocolate has set, carefully remove the half spheres from the molds and place them face-up on a plate.
Fill 6 half-spheres with about a heaping tablespoon each of the hot cocoa mixture, evenly distributing the mixture until it is all used up. You can choose to add about 1 teaspoon of sprinkles inside each bomb, or you can save them just for the outside decoration.
Get a frying pan hot over low heat. One at a time, press the empty chocolate half-spheres onto the pan to melt the edges. Then, use the melted edge to fasten it to a filled half-sphere, to form a hot cocoa bomb. Repeat until you have 6 hot cocoa bombs.
Heat the white chocolate chips in the microwave in ten-second intervals, stirring in between, until melted. If you overheat or it starts to seize, add a splash of coconut, canola, or vegetable oil and mix rapidly until smooth.
2 tablespoons white chocolate chips
Add the melted white chocolate to a piping bag or spoon. Working one at a time, drizzle the white chocolate on top of each hot cocoa bomb, and add the sprinkles on top of the drizzle. Repeat until all 6 are decorated.
2 tablespoons Christmas Sprinkles
Allow the Christmas Hot Cocoa Bombs to set for about 15 minutes at room temperature.