- 2 large egg whites, room temperature
- 1/2 cup sugar
- Pinch of cream of tartar
- Gel-paste food coloring, in assorted colors (<a href="http://sugarcraft.com" target="_blank">sugarcraft.com</a>)
- Preheat oven to 175 degrees. Place egg whites, sugar, and cream of tartar in a heatproof mixer bowl set over a pan of simmering water. Whisk until sugar dissolves, about 2 minutes. Transfer to a mixer, and beat with mixer on medium-high speed until stiff, glossy peaks form, about 7 minutes. Divide meringue into batches, and tint each with food coloring as desired. Transfer to pastry bags fitted with medium open star tips. Pipe hearts (1/2 to 1 inch each) onto parchment-lined baking sheets. Bake for 2 hours. Turn oven off, and let meringues stand in oven for 8 hours (or overnight).
Meringues can be stored in an airtight container at room temperature for up to 2 weeks.