01 -
Set oven to 350°F. Use two sheets of parchment to create a sling for an 8x8 pan.
02 -
Cream butter and sugar together (3 mins) until fluffy. Blend in salt and flour, spreading mixture in pan gently.
03 -
Bake for 15-18 minutes or until lightly golden. Take out and put aside.
04 -
Beat eggs and sugar for a minute to thicken. Stir in flour, grapefruit zest, and juice next. Spread over hot base evenly.
05 -
Bake for another 18-20 minutes until browned and firm. Let cool fully before slicing into 16 pieces.