The proportions of oil, Tabasco and pepper are just suggestions, do not hesitate to adapt them to your taste.
The shallot must really be very finely chopped or minced, if not, it leaves an unpleasant bitty texture. It's easier to chop it separately before putting it in the blender and transforming it into a kind of paste which then mixes better.
If the guacamole must wait before being served, it is vital to put it in the refrigerator with an film of olive oil on the surface, and in an airtight container. If not, it will darken which is unsightly. Just before serving, stir it to incorporate the olive oil and arrange in small dishes.
You can throw away the stones, the legend which reckons that if you leave the stone in the mixture it does not blacken is... a legend
. It's much better to add a pinch of vitamin C. It can be served as an appetiser, accompanied by a Margarita or mexican beer... makes a change from peanuts!