(makes 8 cupcakes)

For the Brown Sugar-Hazelnut cupcakes:
¼ cup hazelnuts
1 tablespoon sugar
¾ cup all-purpose flour
1 teaspoon baking powder
1/8 teaspoon salt
¼ cup low-fat yogurt
¼ cup milk
½ teaspoon vanilla
3 tablespoons butter, room temperature
½ cup packed light brown sugar
1 egg, room temperature

For the Blackberry Swiss Meringue Buttercream frosting:
4 ounces fresh blackberries
1 tablespoon sugar
[Alternately, 2 tablespoons blackberry jam in place of the blackberries + sugar]
2 egg whites
¼ cup + 2 tablespoons sugar
1 stick (8 tablespoons) unsalted butter, cut into small pieces and at room temperature