optional, sand (crushed cereal, cookies, or graham crackers)
Instructions
Pour the Rice Krispies Cereal into a very large heatproof bowl.
Cut the butter into small pieces.
Place the butter, along with the brown sugar, and light corn syrup in a medium saucepan.
Heat on medium heat, stirring as needed, until the butter melts and the mixture begins to bubble around the edges.
Place the lid on the pan for one minute. Condensation will build up and will wash the sugar crystals down the side of the pan.
Remove the lid and allow the caramel to boil for 2 more minutes, without stirring.
Remove from the heat and stir in the sweetened condensed milk.
Return to medium heat and bring it back to a boil.
Allow it to boil for three minutes without stirring.
Remove and immediately pour over the cereal.
Use a heatproof spatula or wooden spoon to stir the cereal until it is well coated with the caramel.
Allow the caramel cereal treat mixture to cool for 5-10 minutes, stirring it frequently, until it's cool enough to touch.
Spoon some of the cereal treat mixture into your plastic mold.
Press down firmly making sure the caramelized cereal fills all the crevices.
Fill each mold to the top and press down using your spatula or spoon to really compress the cereal in the mold.
Turn the mold upside down and shake the mold until the cereal treat sandcastle pieces fall out onto your work surface.
Arrange your sandcastle on a cutting board, serving platter, or cake board and sprinkle edible sand (crushed cookies, graham crackers, or cereal) around the castle.
Notes
This is best eaten the day it is made but it will keep for up to 10 days.