Ingredients:
- Grapefruit zest
- Brown sugar
- Butter
- Vanilla extract
- Lemon juice
Instructions:
- Cut the grapefruit in half and grate the zest using a microplane grater.
- In a small bowl, mix together the brown sugar and butter until well combined.
- Add the vanilla extract to the bowl and mix again.
- Squeeze the lemon juice into the bowl and mix until the mixture is smooth.