In the rinsed saucepan, whisk egg yolks, sugar and vanilla until sugar dissolves. Bring mixture to a simmer over low heat, whisking constantly, about 3 minutes. Remove from heat and slowly whisk into ...
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.