These foolproof meringue cookies are whipped up in minutes, then left in a turned-off oven overnight to develop a crispy exterior and soft, marshmallowy center. Perfect for busy families, they require no stand mixer, no chilling, and no babysitting.
Humidity can affect the texture; on humid days, leave cookies in the turned-off oven for a full 12 hours. Do not overbeat the egg whites—stop when stiff, glossy peaks form. Use a light-colored baking sheet to prevent over-browning. Always use parchment paper. For best results, ensure egg whites are at room temperature. Cookies can be stored in an airtight container at room temperature for up to 2 weeks, or frozen for up to 3 months.
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