On the cakes - is there no time at all a couple of days before?
If there is, you could do something like a brownie up to about 4 days before, or I have a super easy chocolate cake recipe that can be done 3-4 days before.
Victoria sponge I think has to be on the day or day before.
Lemon drizzle I think you can do up to 2 days before.
I'd always go for classic cakes for something like this just because I can pretty much make them in my sleep.
On quantities, I think you need to assume people will want 2, not huge, slices of cake per person.
So I would expect an 8 inch sponge to serve between 12 and 16, a lemon drizzle probably to do 12.
I tend to agree on making the scones because they are better really fresh but it also sounds like you haven't made them before. I don't think I would be prepared to try a new recipe out when I was catering for 25.
Overall, if I had a single morning to produce that catering I would have to buy some of the cakes in I think.
If I could have done the chocolate cake 2 or 3 days ahead (I'll find you the recipe if you want it, most cakes won't cope that well, this is a particular one that does) , and didn't need to make the sandwiches that morning, then I think I could do it.
I'd go as follows:
- First thing to do is the Victoria Sponge, because it needs to cool to be iced. Probably take 20 minutes to half an hour to get it into the oven.
- Then do the lemon drizzle while Victoria sponge is baking because that needs to cool after drizzling so it doesn't break when you get it from the tin.
Then I'd make the scones.
Then ice the Victoria sponge - i like mine with jam and butter icing though I know there are mixed opinions on that.
Then done. I reckon if I worked as quickly as I could I could be done about 3 hours for that lot but it would probably actually take 3.5-4 so I would have to compel myself not to underestimate.
The biggest issue for me would be that I wouldn't have enough cooling racks so if I didn't remember to borrow off a friend it would be a total pain.