In a microwave safe bowl, add the chocolate bark and microwave for 90 seconds. Stir, and continue to microwave in 30 second intervals until chocolate is melted and smooth.
Spread melted chocolate into the spherical molds, making sure to coat the sides and top edges with enough chocolate. Let sit for 10 minutes.
Remove the chocolate shells from the mold. Fill half the molds with 1 tablespoon each of powdered hot chocolate mix, 1 teaspoon of the freeze-dried strawberry powder and 4 mini marshmallows.
Take another shell and lightly swirl it in the remaining melted chocolate. Carefully press the top shell to the bottom shell to create a sphere. Use a butter knife or small paint brush to brush out any globs of chocolate that appear from attaching the two pieces together.
Let sit 5 minutes, then decorate with the cookie icing and press the candy heart sprinkles on top. Let sit another 5 minutes for everything to harden.
To Drink: place the hot chocolate bomb into a mug. Heat ¾ - 1 cup milk (dairy or non-dairy) to a boil. Carefully pour the milk over the hot chocolate bomb and watch it "explode". Stir to combine and top with additional mini marshmallows if desired.