Irish Coffee Meringues

Preheat oven to 250 °F. Line 2 heavy baking sheets with parchment paper. Stir 3 tablespoons sugar, 1 tablespoon brown sugar and 1 teaspoon instant espresso powder in small bowl to blend well. Using hand-held electric mixer, beat egg whites in medium bowl until medium-stiff peaks form. Add remaining 4 tablespoons sugar and 2 tablespoons dark brown sugar to egg whites by tablespoonfuls and beat until stiff peaks form. Fold coffee-sugar mixture into meringue. Drop meringue by rounded tablespoonfuls onto prepared baking sheets, spacing evenly. Using knife, gently spread meringues 2 1/2- to 3-inch rounds. Bake until meringues are dry and can be easily be lifted from parchment, about 45 minutes. Transfer meringues to racks and cool completely. (Can be prepared 2 days ahead. Store in airtight containers at room temperature.)