Add the avocado flesh and all remaining ingredients to a blender and whiz until smooth.
You can also use frozen avocados. Freeze your own avocados by slicing the ripe flesh, freezing it on a baking tray in a single layer, then transfer to a freezer-proof bag or container.
Want it sweeter? Add a little more condensed milk and whiz again to combine.
Be sure to use ripe avocados so the results are silky smooth. A gentle squeeze should make the avocado flesh yield slightly.Need to ripen your avocado? Place it into a paper bag with a banana and a tablespoon of baking soda and leave it in a sunny place overnight or for a few days.Make it vegan: swap the condensed milk for 1 really ripe banana and use sweetened vanilla soy milk instead of the milk. Alternatively, swap both the milk and condensed milk for canned coconut cream (the thick part from the top of the can).