In a large mixing bowl, combine 2 cups of all-purpose flour, 1 teaspoon of salt, 3 tablespoons of sugar, and 2 teaspoons of baking powder. Cut in 1 cup of unsalted cold butter until the mixture resembles coarse crumbs.

Gradually stir in ⅓ cup of cold water until the dough comes together. Wrap it in plastic wrap and chill in the refrigerator for at least 1 hour.

Preheat your oven to 375°F (190°C). Roll out the chilled dough into an oval shape, approximately ¼ inch thick, then transfer it onto a baking sheet lined with parchment paper.

Spoon 2 cups of spiced apple pie filling along the center of the rolled-out dough.

Gently fold the dough over the apple filling to form a loose oval shape, pinching the edges together to seal.

Brush a beaten egg over the surface of the kringle, then bake for 25 minutes, or until golden brown.

Prepare the glaze by mixing 1 cup of confectioners' sugar, 2 teaspoons of vanilla extract, and 2-3 tablespoons of milk until smooth.

Once baked, drizzle the glaze over the warm kringle, slice, and serve.