Well, I was going to post saying that one good thing here is that your daughter is interested in cooking - it's a great life skill. My daughter started cooking quite young (older than 8 though!) and at 14 she is now quite an accomplished cook and baker.
But now I can see you were just letting her play with food and waste it.....
To be honest I agree with your husband - that's really annoying.
Why didn't you say to her, yes we will make soup together, and show her how to actually make it? Soup can be really easy to make, all you would need is a tin of tomatoes, some stock, onion, dried herbs, for a basic tomato soup. And if you had already eaten, it could always be frozen.
OR, tell her that something like soup making requires planning, and distract her with another creative activity - I assume if she is 8 you have some craft stuff in the house, something like that? Or even look up soup recipes with her, get her to do a shopping list with you or something.....
I'm not claiming to be supermum - in fact by Mumsnet standards I am sure I am a pretty lazy parent, but even I can see it's not great to let an 8 year old muck around tipping spices and herbs out into a bowl in the kitchen.....
Can you genuinely not see your husband's point of view? At all?
Not saying he should be an arsehole about it - and certainly he shouldn't take it out on your daughter.....