150g melted butter (cooled)
1 lemon (rind and juice)
1/2tsp vanilla extract
150ml plain flour
Preheat oven to 150oc.
Place baking paper in a 20cm diameter baking tin.
Whisk the eggs and sugar until slightly fluffy.
Add the vanilla, lemon and mix until smooth.
Add the butter and flour and mix on low speed until well mixed.
Pour mixture into baking tin and bake in middle of oven for 35min.