Preheat your oven to gas mark 4 (180c). Prepare a baking tray roughly 21cm x 21cm and cover with some baking paper and then grease with some butter.
In a pan, peel, wash and boil the potatoes until soft (15-20 mins) and once cooked blitz them in a blender until a puree forms. Add 10-20ml of water if needed.
In a mixing bowl, whisk together the melted butter, brown sugar and granulated. Once combined, whisk in the egg and vanilla essence then add in the potato pureed mixture.
Add in the flour using a sieve followed by the baking powder and salt and mix until completed combined and no lumps are visible and it resembles a thick batter.
Fold in your white chocolate chips if using, then pour and spread the mixture evenly on the baking tray and bake for 28-32 minutes until golden on the top.
Once cooked, allow to cool for 5-10 minutes then slice into 9 even squares and top with your favourite toppings.
Serves: 9
Preparation: 25 mins
Cooking: 30 mins
150g Albert Bartlett Original Rooster Potatoes
220g plain flour
170g melted unsalted butter
150g light brown sugar
175g granulated sugar
1 cap full of vanilla essence
1 tsp baking powder
a pinch of salt
1 egg
white chocolate chips (optional)