Preheat oven to 400°. Place butter in a 9-in. pie plate. Place in oven for 4-5 minutes or until butter is melted; carefully swirl to coat evenly. , Meanwhile, in a large bowl, whisk eggs, milk, orange zest and extract until blended. Whisk in flour, sugar and salt. Pour into hot pie plate. Bake 20-25 minutes or until puffed and sides are golden brown and crisp., In a small bowl, combine topping ingredients. Remove pancake from oven; serve immediately with topping.