To make homemade condensed milk, gather these ingredients: 2 tablespoons of butter (optional, for creamier texture) ½ ...

While there are differences in the exact formula, several sources recommend starting with a 40% milk and 60% water solution. You can always make the spray stronger if needed.

To emulsify the solution, thoroughly mix in one teaspoon of washing up liquid. ... To make the solution use a 40 to 60 ratio of milk to water.