Learn how to make sweetened condensed milk frosting and pie/tart filling with one ingredient in 1 minute or less. It's a genius hack!
REFRIGERATE a can of sweetened condensed milk overnight. Open and pour sweetened condensed milk into a blender and blend for about one minute or less... or until sweetened condensed milk is so thick that the blender blades can barely move.
Turn the cup of the blender upside down and sweetened condensed milk frosting won't come down. That's how you know it is thick enough!
Then, spoon sweetened condensed milk frosting into a piping bag and frost cakes, or use it as a filling for tarts and pies. Preferably, refrigerate cake/pie/tart -- especially at summertime.
Of course, you can also just straight out eat it by the spoonful (MY FAVORITE WAY because, as you know, you have to taste everything that you make first, right?). ;)