Macaron tips!

Toast

how shall I make them without the peaks and the popped air bubble marks? 

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Not a pastry chef and it's been years since I've done these.

That established, you need to go sideways and sort of circular with your piping bag to avoid the peak. I also think you may have gotten the bubbles from over mixing. The mixing is a fine line and usually is something you learn first hand from a fellow pastry chef or by trial and error.

Dave

slam the tray to remove bubbles, proper technique avoids nipple.

No need for screen after baking.