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.
Hell I just mix strong black coffee with hot chocolate and add half and half or whipping cream for added decadence.
Bulk, cheapest grocery outlet store coffee and any hot chocolate that isn’t nestle because fuck nestle.