Combine 2 cups of sugar and heat without high flame.
Once the sugar starts to melt, stir with a spatula until it dissolves completely. If it still has lumps, continue stirring until it's smooth.
Add whipping cream (room temperature) and mix well.
Remove from heat and add unsalted butter (about 200g).
Add vanilla extract and sea salt (1/2 teaspoon), reducing the amount of salt if using salted butter.
Decide on the thickness of cornflakes you prefer. Extra sweet? Increase sugar; less sweet? Increase cornflakes.
Use 500g thin cornflakes for this recipe.
Spread the mixture evenly onto a baking tray and bake in an oven preheated to 170C for about 5 minutes.
Break into pieces while still warm. This gives it a crunchy texture and longer shelf life.
Let it cool down completely before storing.