Thinking and typing at the same time so excuse randomness
Whats indulgent and could be associated with icecream
Chocolate, cream, strawberries, ice cubes, velvet, vanilla, excess, raspberry, coffee, beautiful voluptuous women, jewels, gold
I think I'd try getting hold of a piece of rich blue velvet to form a base and a backdrop then making dense piles of ice, strawberries/raspberries, ice, coffee beans, vanilla pods, cinnamon sticks to take a still life of it. Soft focus, rich saturated colours, excess of riches with a of cold/ice/snow
or how about an image of a woman biting a chocolate dipped strawberry while wearing luxurious winter scarf and hat, maybe even cropped from top of scarf/chin to nose. key would be to have everything very luxurious i.e. indulgent.