Sweet Potato Casserole - cooking recipe

Ingredients

5 big sweet potatoes
1/2 stick butter
2 Tbsp. brown sugar
2 Tbsp. sugar
1 egg
dash of salt

Preparation

Bake sweet potatoes at 350\u00b0 for 1 hour.
Mix potatoes and other ingredients in electric mixer.
Bake in casserole dish for 15 to 20 minutes at 350\u00b0.
Put marshmallows on top and let melt.
Do not cook.