Preheat oven to 425°F. Spray Doughnut Pan with vegetable cooking spray.
Doughnuts: In large bowl, sift together flour, sugar, baking powder, nutmeg and salt. Add buttermilk, eggs and butter. Beat until just combined. Fill each pan cavity approximately 2/3 full.
Bake 7-9 minutes or until the tops of the doughnuts spring back when touched. Let cool in pan 4-5 minutes before removing. Doughnuts are best served fresh.
Chocolate Glaze: In medium bowl, melt chocolate chips, butter, and corn syrup on 50% power for 1 minute, stirring frequently until completely melted. Stir in 1 teaspoon of hot water, stirring until the glaze is thick and smooth. Add another teaspoon if glaze is too thick. Use immediately to glaze doughnuts.