Store meringues in an airtight container at room temperature for up to one week. Keep away from humidity, which will cause them to become sticky and soft. Only use gel or powder food coloring — liquid food coloring contains water that will deflate the meringue. Even a tiny trace of egg yolk will prevent whites from whipping — use a clean, dry bowl and beaters. The cooling-in-the-oven step is not optional — pulling them out while the oven is hot causes cracking.
Nutrition information provided is just an estimate and may vary based on specific ingredients used.