Use aged egg whites: “Aged” egg whites are necessary to help prevent over … In a small saucepan, bring granulated sugar and 3 tablespoons water to a boil over medium-high heat. Meanwhile, in the bowl of a stand mixer fitted with the whisk attachment, beat Me, Myself & Meringue I still can't believe I feel ready to share my macaron techniques with you. Store-bought liquid egg whites or meringue powder will not create a meringue batter that is strong enough for macarons. It feels so great to be at the point where you know what works and what doesn't, what's important and what's … Let simmer until a candy thermometer registers 248°F/118°C, about 5 minutes.