Preheat oven to 425°. Melt butter in cast iron skillet in oven.
Beat eggs; add eggnog and flour. Pour into hot skillet; sprinkle with almonds and sugar. Bake until puffed and brown, 16 to 18 minutes. Serve immediately.
Ever wonder what Santa Claus has for breakfast? Well, now you know.
Mr Breakfast would like to thank Mr Breakfast for this recipe.