Try this Easy Macaron Recipe recipe.
Macaron structural integrity depends entirely on the denaturation of egg white proteins during whipping and the subsequent evaporation of surface moisture during resting. When egg whites are beaten with salt, the globular proteins unfold and trap air, while the incremental addition of fine sugar stabilizes this foam by increasing the viscosity of the liquid film surrounding each air bubble. Sifting the ground almonds and powdered sugar removes coarse particles that would otherwise puncture the delicate meringue matrix during folding.
Allowing the piped batter to sit at room temperature for twenty minutes forms a dry, shiny skin across the exterior, which forces steam to escape downward during baking and creates the characteristic ruffled foot. Baking at 320 degrees Fahrenheit for a total of fourteen to sixteen minutes requires opening the oven door midway through to release accumulated humidity. Letting the shells cool completely on the silicone mat before handling prevents tearing, because hot sugar structures remain malleable until ambient temperature fully sets them.