Raspberry Chocolate French Macaroons

INGREDIENTS

• 1 tablespoon unsalted butter, softened
• 6 oz sliced blanched almonds (not slivered; 2 cups)
• 3 oz fine-quality bittersweet chocolate (60 to 64% cacao), finely chopped
• 1 1/2 cups confectioners sugar
• 1/16 teaspoon raspberry extract (preferably McCormick brand)
• Red or pink food coloring
• 3/4 teaspoon salt
• 3 tablespoons granulated sugar
• 1/3 cup heavy cream
• 3 large egg whites