Hold the bag straight up to pipe the macarons, hovering the tip about half an inch above the circle's center. Keep squeezing the bag until the batter evenly flushes out to the edge of the circle.
Mist a 9-by-13-inch baking pan with cooking spray, dust evenly with flour ... Pour into the large bowl of flour-butter mixture and fold the batter with a silicone spatula until only a few streaks of ...