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.
It’s either chocolate milk shake or chocolate cake which is relatively cheap near my place 60 for ms and 15-30 rs for cake. But if I feel I need more I get a waffle with white + normal chocolate.