In a large bowl, combine your citric acid, baking soda, and cornstarch then mix well.
In a separate bowl, add a couple of drops of pink food coloring and 3 drops essential oil to your coconut oil and mix
Then slowly add your wet mix to the dry mixture and mix well until you've added it all
Once all of your wet mixture is added, your mixture should feel like damp moldable sand
Start filling your heart mold with your mixture, making sure to press the mixture firmly into the molds
Let dry overnight and carefully pop them out. Place one in the bottom of your shower or in your warm bath tub to release your bath bomb