In a double boiler set up (where you place 1 inch of water in a saucepan and place a glass or metal bowl over the rim of the saucepan) or in a microwave safe cup, melt the chocolate and coconut oil together. If using a microwave, stop every 30 seconds to stir it and stop just when it can be stirred smooth (overheating can cause the chocolate to seize which ruins it).
Once melted, using a pastry brush, a clean food safe paintbrush, or just a spoon, brush the melted milk or dark chocolate in a semi-thin layer over the bottom and up the sides of each mold cavity. Pop into the freezer to let it set up.
Meanwhile, in a small bowl, mix together the cream cheese, butter, powdered sweetener, cream, vanilla, and salt.
Scoop about 2 tablespoons of the white filling into another small bowl. Add enough yellow food coloring or turmeric powder (keep in mind the turmeric can affect flavor) until a bright yolky yellow color results.
Fill one piping bag or a zippy bag with the white filling and another with the yellow. Snip the tip of the piping bag or one corner of the zippy bag to pipe.
Once the chocolate shells have hardened, remove from the freezer.
Pip the white filling on the bottom and up the sides of each shell, leaving a "hole" in the middle of the filling.
Fill the hold in the middle of the white filling with the yellow filling.
Using a flat edge spatula, spread some of the melted milk or dark chocolate over the top of each shell to seal in the filling.
Pop in the freezer until chocolate has set, about 15 minutes.
Once the chocolate has set, remove from the freezer. Carefully pop each half egg out of the mold.
Optional Decorating
Place the eggs flat side down on a sheet of parchment paper.
In a double boiler set up or a microwave safe cup, melt the white chocolate chips. If using a microwave, stop every 30 seconds to stir it and stop just when it can be stirred smooth (overheating can cause the chocolate to seize which ruins it).
Split the melted white chocolate into separate bowls, one for each color you are doing.
Color with a couple drops of oil based food coloring (oil based MUST be used here lest the chocolate seize).
Scoop each color into piping bags or small zippy bags. Snip the tip (or corner if using a zippy bag).
Pipe the white chocolate over the shells however you like. Sprinkle with colored sweetener before the white chocolate harden.