Easy German Apple Streusel Pie

Details

Ingredients

• 1 egg
• 4 large apples - peeled, cored, and thinly sliced
• 1 pinch ground cinnamon
• 7 ounces unsalted butter, at room temperature
• 1 cup white sugar
• 3 teaspoons vanilla sugar
• 2 cups all-purpose flour
• 3 ½ teaspoons baking powder