I really have to change something in the recipe i find. For this one, as usually, I would really advice to reduce the amount of sugar. In the cake and the topping.
I’m sorry but almost 1 kg sugar for that recipe is too much for me.
So i totally changed the topping.
Cream 120g of butter with 180g of brown sugar in the robot. Add 2 eggs. Add 250g flour plus 2 tsp baking powder and 1 tsp baking soda. Mix. Add 4 mashed bananas. Mix. Cooked in the oven 180° for 20 minutes.
Topping: I made a caramel heating 175g of sugar. I added 45g of butter and 70g of cream cheese. I let that in the fridge for a few hours and I covered the cupcakes. These adjustment of the recipe (from The primerose bakery book) give you another version, less sweet of banoffee cupcakes.
Let me know if you try and if you like it!