Add the coconut oil to the double boiler with the melting soap and heat over medium until melted.
Remove the pan from the heat and pour the mixture into a bowl, then add the rose essential oil and vanilla oil and stir well to incorporate.
Add the soap colorant of your choice and mix well until you achieve your desired color. You could also use mica as a colorant, but it does leave a ring in the tub.
Now, combine the soap and oil mixture with the granulated sugar.
Stir until well combined.
Sprinkle a small amount of the sugar sprinkles into each mold (this is optional, but it will make each heart appear to be extra sparkly!). Transfer the sugar, oil and soap mixture into each heart mold, pressing down firmly and filling each cavity to the top.
Freeze your sugar scrub cubes for 1 hour, then release the exfoliating cubes from their molds.
Notes
Store in an airtight glass container in a cool, dry place for up to 3 months.