Empty the condensed milk into a mixing bowl.
Fill the empty can with hot water (14 oz) and pour it in. Mix until fully combined.
Add 2 cups whole milk and 5.3 oz Greek yogurt. Stir gently (note: if you see foam, scoop it out)
Pour the mixture into glass jars.
Place the jars into a large container and fill the container with hot water (about halfway up the jars).
Cover with cling wrap, a kitchen towel, and something heavy on top.
Place in a warm spot (like your oven, turned OFF) for 6–8 hours.
Refrigerate before eating... it thickens and gets even creamier.
