Prepare the Batter: The batter should be pourable, but not too runny. In a bowl, whisk together the eggs, sugar, and a pinch of salt until light and slightly frothy. Add the milk and whisk again. Gradually sift in the flour and whisk until smooth.
Soak the Raisins (If Using): Place the raisins in a small cup and pour over the rum or warm water. Let them soak while you prepare the pancake.
Cook the Pancake: Heat butter in a large skillet over medium heat. Pour the batter into the skillet, making sure it's about 1 cm (⅓ inch) thick. If using raisins, sprinkle them evenly over the top. Cook uncovered for about 5-7 minutes, until the bottom is golden brown and the top starts to set.
Flip and Shred: Use a spatula to divide the pancake into quarters and flip each piece separately. Cook for another 2-3 minutes, until golden brown on both sides.
Using two forks (or utensils of your choice), tear the pancake into bite-sized pieces and cook for another 2 minutes, tossing occasionally to crisp up the edges.
Serve: Dust with powdered sugar and serve warm with jam, fruit compote, or fresh berries.
Notes
Skip the raisins – Not a fan? Just leave them out!
Use vanilla or cinnamon – A teaspoon of vanilla extract or ground cinnamon adds extra flavor.
Caramelized Kaiserschmarrn – Sprinkle some extra sugar over the pancake while cooking for a more caramelized crust.