Through childhood, I loved to be alone in the house to have my favourite indulgence - a concotion I would make myself in a mug - 1/2 dried milk powder, 1/4 sugar (caster sugar if possible) and 1/4 cocoa powder. I would mix the dry ingredients and then add small amounts of water till it was a paste and then eat the lot with a spoon. I loved it better than just about anything and it was my secret indulgence.
Now my absolute indulgence is again my own invention. I don't think it is unique, but I did feel very inventive when I discovered it. Take a medium size glass and if available a long thin spoon like a parfait spoon. Fill the glass with frozen berries (blueberries or raspberries are the best!) and push them down a little bit. Then fill the glass with milk (or, like me, soymilk) and start to eat the berries. The further down the glass you go, the more the milk has been frozen by the berries and it is the most delicious taste and icey and creamy texture. And I love alchemy of the mix and can eat 2 or even 3 glasses of this indulgence!