Homemade Bourbon Biscuit Recipe

Name: Homemade Bourbon Biscuit Recipe
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: European, British
Ingredients: 1 1/3 cup (6 oz) all purpose (plain) flour; 1/2 cup (2 oz) custard powder (Bird’s Custard Powder-available on Amazon and in British shops); 1/4 cup (1 oz) unsweetened cocoa (I use Barry cocoa); 1 stick (4 oz) butter; 1/2 cup (4 oz)Baker's/caster sugar; 1 egg; 1 cup (4 oz) confectioner's/powdered sugar; 1/4 stick (1 oz) butter; 2 tbsp unsweetened cocoa; a few drops of milk or water