Keep the puff pastry cold: Cold pastry gives you the best puff and flaky layers. If it gets very soft while you're working with it, pop the baking sheet in the refrigerator for 10 minutes before baking.
Soften the cream cheese: Room-temperature cream cheese makes a much smoother filling and is easier to pipe. Cold cream cheese can leave little lumps behind.
Leave a pastry border: Pipe the cream cheese down the center without covering the edges. That exposed pastry has room to puff up around the filling as it bakes.
Don't overfill them: More filling sounds tempting, but too much can spread over the pastry as it bakes. Divide the cream cheese mixture fairly evenly between the 6 pieces.
Use the color as your cue: Start checking around 10 minutes and look for puffed pastry with deeply golden edges rather than relying only on the clock.
Serve them warm: I think these are best after they've cooled just enough for the cream cheese filling to set but the pastry is still warm and crisp.
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