To make the sponges, add the pitted dates to a bowl.
Pour the hot water over them and leave them to soak for 10 minutes.
In a large mixing bowl, add the soft butter and sugar, and use a hand mixer to beat them well until you have a creamy texture.
Add the eggs one by one, beating well after every egg added.
Add the bicarb of soda, baking powder, sifted flour and treacle.
Use a hand mixer or a blender to blend the dates in the hot water until you have a sticky, smooth paste.
Add it to the rest of the ingredients, and use a spatula to mix them all together into a batter.
Divide the batter between 8 ramekins or aluminum muffin cases and air fry at 160 degrees Celsius (320 Fahrenheit) for 15-17 minutes until a skewer inserted in the middle comes out clean.
Remove them from the air fryer ( you might have to air fry in batches).
To make the sauce, add all the ingredients to a pan set over a medium heat, and leave it to simmer, whisking often, until you get a smooth sauce.
To serve, remove the puddings from their cases, and pour the sauce over.