If you want to use gluten-free digestives instead of gluten-free shortbread increase the amount of melted butter in the base to 95g.
Calories: 652kcal | Carbohydrates: 51g | Protein: 6g | Fat: 47g | Saturated Fat: 30g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 0.2g | Cholesterol: 124mg | Sodium: 217mg | Potassium: 95mg | Fiber: 3g | Sugar: 34g | Vitamin A: 1341IU | Vitamin C: 3mg | Calcium: 110mg | Iron: 0.2mg