Cover 2 baking sheets with parchment or wax paper (make sure they fit in your refrigerator).
Melt the chocolate in a stainless steel bowl set over a pot of simmering water.
2 cups chocolate chips
When chocolate is completely melted, take it off the heat and stir.
Pour the chocolate over the cornflakes and carefully stir with a rubber spatula until everything is coated. VERY IMPORTANT: Make sure you let it cool off a little before you pour it over the cornflakes so the cereal does not get soggy.
2 cups cornflakes cereal
Use a tablespoon to make little heaps on the baking sheet until you have used up all the mixture. (If you want to make them smaller, you can use a teaspoon instead.) Top with nuts or sprinkles, if desired.
Chopped nuts, Sprinkles
Chill in the fridge for about 30 minutes.
Notes
I like to melt my chocolate chips on the stovetop for the smoothest result, but you can melt them in the microwave in 30-second increments (stirring in between) if you prefer.
After melting the chocolate, let it cool just slightly. It needs to still be warm enough to pour and mix, but if the chocolate chips are too hot, they'll turn the cornflakes soggy.
I use an even ratio of chocolate chips to cornflakes to make these, so it's really easy to increase the amount and make as much as you want.
Nutritional information does not include optional toppings.
Storage: Store chocolate cornflake no bake cookies in an airtight container in the refrigerator for up to 1 month.