Pretty and Polished: Slimming World Brownies. Works out as syns in total for the whole tin (including the icing). So you would just need to cut them into however many squares you like and work out the individual portion's syn value.
Slimming world brownies 3 syns for the whole pan 2 large sweet potatoes 4 eggs truvia 2 Tbsp cocoa powder syns) Bake the sweet potatoes, remove from skins and mash. When cool whisk in rest of ingredients well and bake at 200 for 20 minutes