Prepare a 13 x 9 baking sheet with wax paper and a spritz of non-stick cooking spray.
Melt butter in a large saucepan over low heat. When the butter is melted, add the marshmallows and melt, stirring constantly. Remove the saucepan from heat.
3. Fold in the cereal. Stir until the cereal is coated in the marshmallow.
4. Using a buttered spatula or greased wax paper evenly press mixture into baking sheet. Cool completely.
Cut the cereal into 8 treats.
Place candy melts in a microwave safe bowl. Melt on high heat, stirring every 30 seconds until completely melted. Do not overheat. If the candy is too thick, add vegetable shortening or coconut oil in 1 teaspoon increments, up to 1 tablespoon, and stir well. Do not add water or it will cause the chocolate to break.
Spread melted candy over ⅔ of each krispie treat and decorate with one heart candy.
Allow to dry completely before storing or packaging.