Grapefruit-soaked cake - Trois fois par jour

Ingredients

• 2 cups of all-purpose flour
• 2 teaspoons of baking soda
• A pinch of salt
• 1/2 cup of softened butter
• 1 cup of brown sugar
• 2 eggs
• 1/2 teaspoon of vanilla extract
• 3/4 cup of fresh grapefruit juice
• 1 cup of fresh grapefruit juice
• 1/4 cup of honey (or brown sugar)