Place 4 tablespoons of butter in a large pot over medium/low heat, add in marshmallows. Heat, stirring frequently until the butter and marshmallows are melted and smooth.
Remove the marshmallow mixture from the heat and add in the crispy rice cereal. Stir gently folding the cereal into the melted marshmallows until they are evenly distributed and coated.
Cover a flat work space with wax paper or parchment paper. Place 1-2 tablespoons of butter in a shallow dish. Grease the inside of your cookie cutter and the palms of your hands and fingers with the butter.
Grab a handful of the rice krispie mixture and evenly press it into the cookie cutter. Gently lift the cookie cutter leaving a heart shaped rice krispie treat.
Repeat with the rest of the mixture until all of it has been turned into hearts.
Allow the treats to cool completely.
When you’re ready to decorate your treats it is time to melt the chocolates. Place one color of chocolate melts in a microwave safe bowl.
Microwave in 20 second increments, stirring between each, until the candy is melted and smooth.
To create a smoother, more liquid consistency you can add 1/2 tsp shortening at a time until the desired consistency is reached.
You want them to be smooth and lump free but not runny.
Once they are melted allow scoop them into a plastic piping bag and snip off the end to create a small hole. To make filling the piping bag easier place it in a tall glass and fold it open over the sides (like putting a bag in a trash can) and then spoon your melted chocolate into it.
Pipe around the edges of your treat to make a heart outline. Then fill it in by piping the melted candy and then smoothing it with a knife or spoon.
Gently tap the treat on your work surface to help level out the chocolate and eliminate any bubbles.
Set aside and allow to cool.
Repeat with additional treats until all of them are decorated.
If you are using more than one color work with one color at a time using separate piping bags for each color.
Once you’ve finished all your treats and they are all cooled it is time to write sayings on them. .
Melt pink (or desired color) candy melts the same way as you did the other ones and place them in a piping bag.
If you’re feeling confident you can pipe your words directly on the treats. Alternately you can use an edible marker and write out your message and pipe over it. (Made a mistake? You can wipe the edible marker off of the chocolate coating with a wet paper towel)
Pipe on your lettering and set aside to cool.
Once all you treats are decorated and cooled they are ready to eat!
Store in an airtight container.