Been using this recipe for years with great success, I use frozen egg whites/thawed right out of the fridge.
Macaroons 300 Degrees Convection Oven
2 # 10X
1 # Blanched Almond Flour
2 Cups egg whites
1 Cup Superfine Sugar
Coloring either dry or wet
Sift 10X & Almond Flour, Beat whites till stiff and add sugar & beat till sugar is dissolved & add color. Fold in 10X mixture in 3 stages, pipe out onto silpat & I let sit about 10...