Glazed Lavender Tea Cake

INGREDIENTS

• 1 cup granulated sugar
• 5 tablespoons butter or stick margarine, softened
• 1/2 teaspoon vanilla extract
• 1 large egg
• 1 large egg white
• 1 3/4 cups all-purpose flour
• 1 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon salt
• 1 cup plain fat-free yogurt
• 2 tablespoons finely chopped fresh lavender leaves
• Cooking spray
• 1/3 cup sifted powdered sugar
• 1 teaspoon water
• 1/4 teaspoon vanilla extract