Spray a 13x9 baking dish with cooking spray and line with parchment paper by making a sling over the sides. Spray the parchment too.

In a 2 quart or larger saucepan, melt the butter and the marshmallows over medium to medium high heat. Stir constantly until the mixture is melted and smooth.

Immediately pour the marshmallow mixture over your Rice Krispies and stir. Continue to stir the mix until everything is well combined and the cereal is thoroughly coated and sticky.

Spoon the marshmallow cereal mixture into the prepared pan.

Using a piece of plastic wrap, press into the pan to make an even and compact mixture.

Cover tightly with plastic wrap, and allow to sit for a couple hours or overnight until the mixture is cool and set.

Once the Rice Krispie Treats are set, use the parchment paper sling to remove from the baking dish.

Trim the edges of the treats into a neat rectangle with straight sides. Cut into 12 bars and set aside.

Melt candy melts in a heatproof bowl over a pot of steaming water or microwave in 15-second intervals after an initial 1-minute heat. Stir until smooth. Next, line a cookie sheet with parchment paper and set aside.

Once the chocolate melts are melted, take one of the Rice Krispie Treats and dip it into the candy coating. Only come halfway up the bar. Feel free to use a spoon to help create an even line and get the bottom half of the Rice Krispie Treat evenly coated.

Shake off the excess and set down on a piece of parchment or wax paper.

Unwrap and press a chocolate heart into the center of the Rice Krispie Treat.  Add a little melted chocolate to the back of the candy heart if it's not sticking well.

Lastly, sprinkle the pink coating with the Valentine sprinkles.

Repeat until all the treats are dipped and decorated.

You can chill the treats for 30 minutes or allow them to sit at room temp until set.