When I want a little sweet treat I make smoothies.
My base is always frozen banana + milk + oats then do one of these:
Cinnamon + vanilla
Pumpkin + pumpkin spice+ brown sugar
Strawberries/blue berries
Cost like under a dollar to make a good cup and they are pretty filling.
I always buy bananas and wait for them to get brown, and make banana milk with them. I’ll try to freeze them and also add oats, that sounds really good