The Healthy Boom on Instagram: "4-INGREDIENT LOTUS BISCOFF CAKE 😍 This cake is super soft and moist and it just melts in your mouth, topped with a silky smooth Biscoff topping 🤤 It’s super quick and easy to make and you only need 4 ingredients 🫶 Sound on for full instructions 🔉 All you need is: For the cake: 400g Lotus biscuits 1.5 tsp baking powder 380ml milk (whole or semi-skimmed), at room temperature For the topping: 125g Biscoff spread, melted 2 tbsp Lotus biscuit crumbs Tin…