In a pan, mix together, milk, condensed milk, brown sugar, baking soda and corn syrup.

Mix well until all ingredients are dissolved in milk.

Heat the mixture and cook until it starts boiling.

Lower heat and keep on stirring until the milk reaches a thick consistency.

Use a spatula and divide the milk. The bottom of the pan should be seen for a few seconds before the mixture comes together.

If you feel that the mix is coarse because of the thick milk solids, use a blender to blend it until smooth.

Pour into a storing jar, cover with cling film so that the cling film touches the top layer of the mix. This is to avoid the formation of skin.

Once completely cool, you can refrigerate and use.