Well I am thinking have her legs and arms tied up so there's no escape also that her lovely long hair is straightened and left down lol then a collection of savoury foods poured over her head and watch each one drip down one by one maybe. Watching the reaction of each one before inflicting the next one on her.
you can get 5 litre bottles of treacle (molasses) from horse feed suppliers and watch for clubcard deals on big cartons of custard. Aldi have currently got large paddling pools on the middle aisle for £15
Probably too kind for you, but how about a nice spa treatment for your willing victim?
1. A nice rice pudding footbath. 2. A pre made trifle down the back of her shirt. 3. Two squirty cream pies for her chest. 4. Nice squishy cake to sit on. 5. A face treatment pie 6. Rice pudding recycled down her front. 7. A bucket of slop over her head to finish off.
Has to be lots of treacle over the head. A good big coating of custard all over. Slops down the front of her top/dress. A baked bean panty filling. With a final rice pudding pour over the head and maybe a couple of thick creamy pies to the face for a finale.