Roll one sheet of thawed puff pastry out on a lightly floured surface and gently smooth the seams. Cut into 4 equal squares and transfer to a parchment-lined baking sheet, spacing them slightly apart.
2 sheets (1 box) store-bought frozen puff pastry
Fold each corner of the squares slightly toward the center, pressing gently so they adhere while leaving the center open to create a border for the filling.
In a medium bowl, mix the softened cream cheese, granulated sugar, and vanilla extract until smooth and fully combined.
8 oz (226 g) full-fat, block cream cheese, ⅓ cup (67 g) granulated sugar, 1 tsp (5 ml) vanilla extract
Spoon 1 to 2 tablespoons of the cream cheese mixture into the center of each pastry and spread slightly, keeping a border around the edges.
Top the cream cheese with a small spoonful of strawberry jam and gently spread it over the surface.
½ cup (160 g) strawberry jam
Beat the egg in a small bowl and lightly brush it over the exposed edges of each pastry.
1 large egg
Bake at 400°F (200°C) for 18 to 22 minutes, or until the pastries are deeply golden and fully puffed.
While the first batch bakes, keep the second sheet of puff pastry refrigerated so it stays cold.
Once the first batch is in the oven, roll out the second sheet, cut into 4 squares, shape, and fill in the same way.
Allow the baked danishes to cool on the pan for 5 to 10 minutes, then transfer to a wire rack to cool slightly.
Whisk together the confectioners' sugar, milk, and vanilla extract until smooth and drizzleable, then drizzle over the slightly cooled danishes before serving.
1 cup (120 g) confectioners' sugar, 1-2 tbsps (15-30 ml) milk, ½ tsp (2.5 ml) vanilla extract