Brownie cake - mix in advance?

[BrassicaBabe]

Hi

I've got folks coming for dinner on Saturday. Could I prepare this cake mix, maybe Saturday morning, then cook as folks arrive Saturday evening? I'm not a great baker...

www.bbcgoodfood.com/recipes/2882/chocolate-brownie-cake-

My understanding is that as soon as the wet and dry ingredients are mixed, the chemical reaction that causes the rise starts so I don't think it would work. You could prep the dry and wet separately and mix just before putting in the oven ...?

Make them then freeze them - just make sure it's packaged in an airtight secure container/wrapping. Cakes and brownies freeze really well!

Preparing in advance might be the answer. Thanks.

I'm no baker, but this recipe doesn't seem to have any ingredient that would cause this one to rise?

Traditional brownies don't rise, unlike cakes. Brownies are dense and rich so don't need raising agents.

This recipe uses whisked egg whites, these will give it a lighter more cake texture. Interesting concept. Tbh I would play it safe and do either a chocolate sponge cake, or traditional brownies - rather than this unusual hybrid!

Also I'm not sure how the cake texture would turn out after freezing/defrosting, as the egg whites would be more unstable than traditional raising agents. Someone else might be able to advise based on past experience!