Any specs? Chocolate? Not chocolate?
For a cocktail party, bite-size brownies or bouchons (you can “fun” them up with additions) will freeze well. I’ve made my favorite Medrich brownie recipes in mini tins for a party, or there are the various bouchon recipes (Bouchon Bakery, Gateau, LPQ’s Belgian brownies, etc).
Cheesecake bars of some sort? Or also assembled in mini muffin tins / liners as bite-size.
What about an icebox cake? Or something like that also in bite size form. There’s a whole thread about them, and also this SE Ritz cracker pie recipe that would be easy to stack individually (and alter flavor profile on).
