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How to make a no bake birthday cake
Place the biscuits into a re-sealable zipper storage bag.
Use a rolling pin to make crumbs out of the biscuits.
Melt the butter in a saucepan and stir in the biscuit crumbs you have created.
Tip the mixture into the bottom of a 20 cm (7.8 ") flan dish and press it down with the back of a spoon to make a flat base. Set it on the side to cool.