With the Koopmans mix for apple crumb sheet cake you can easily make an apple cinnamon sheet cake with apple pie base and crispy crumbs.
* Makes 12-16 servings
* Wonderfully soft and creamy, with crispy crumbs
* Including baking tin
* Add: 4 apples, 50 g raisins, 130 g butter, 2 eggs, 75 ml milk
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