You'll want to follow a roughly 2:1 ratio, using two cups of milk for every cup of sugar. Combine the ingredients on the stove, let it boil, and stir frequently.
Slowly simmer the mixture on the stove for about 45 minutes, or maintain a medium temperature for 20 minutes. Once it’s a thick syrup, let it cool and store it in the fridge.
Making sweetened condensed milk at home allows you to customize its flavor by using ingredients like maple syrup or honey, adding vanilla, or infusing it with cinnamon or herbs.
To enhance richness, incorporate heavy cream or butter into lower-fat or non-dairy milk for a nuttier and richer syrup. Some home cooks even add baking soda for creaminess.