The method (to my madness) Preheat the oven to 170°C (conventional oven) 150°C (fan-assisted oven) Add the butter and sugar into a bowl and whizz up until light and fluffy. I still use a rotary whisk as it takes me back to my childhood of making Angel Delight. My three favourite things in the kitchen when I was young were our hand whisk, rotary orange cheese grater and our soda stream. You know you feel your age when you can buy these things again and they are referred to as being retro! If, like me, you are using a manual whisk just think how many calories you are burning, which will make you feel less guilty having more than one bun!