This easy German apple sheet cake recipe uses simple ingredients and only takes 30 minutes in the oven! It's topped with almonds like a butterkuchen ! A traditional Apfelkuchen recipe everyone loves.
Mix the Batter: In a large bowl, whisk the heavy cream, sugar, vanilla sugar, and grated lemon zest until slightly thickened. Add the eggs one at a time, mixing well after each addition. Sift the flour and baking powder, then gently fold them into the mixture until you have a smooth batter.
Make the Topping: While the cake is baking, prepare the almond topping. In a saucepan, heat the sugar, butter and milk until the sugar dissolves. Add a big pinch of salt. Stir in the almond flakes and cinnamon (optional) and let them coat evenly in the mixture.
Add the Topping and Finish Baking: After the first 15 minutes of baking, remove the cake from the oven. Spoon the almond mixture over the top, spreading it gently with a tablespoon. It will spread more while baking .Return the cake to the oven, this time on the second rack from the top, and bake for another 15 minutes until the almond topping is golden brown and crisp. I cover the pan with some parchment paper during the last 6-7 minutes so keep it from browning too much.
Tip : For an extra moist cake batter you can substitute 1/2 cup of the flour with ground almonds.