Melt the butter in a large saucepan over low heat.
1/4 cup butter
Add the marshmallows to the melted butter and stir constantly until completely melted. Remove from heat.
10 oz marshmallows, 1/4 cup butter
If desired, add a few drops of red food coloring for a Valentine's Day hue. Mix well.
Red Food Coloring
Pour the Rice Krispies cereal into the marshmallow mixture. Stir until well coated.
6 cups Rice Krispies cereal, 10 oz marshmallows
Transfer the mixture into a greased 9x13 inch pan or onto parchment paper.
Gently press the mixture evenly.
Using a heart-shaped cookie cutter, cut out hearts while the mixture is slightly warm.
Decorate with sprinkles, candies, or icing of your choice.
Sprinkles, candies, icing
Let them cool completely before serving.
Share the love! Enjoy your Rice Krispie Valentine Hearts!