1/2 c. butter
2 c. sugar
1 c. mashed, cooked sweet potatoes (can use canned)
1 t. vanilla
4 eggs
1 1/2 c. flour
2 t. cinnamon
Powdered sugar (opt.)

Cream butter and sugar; add sweet potatoes and vanilla; mix well. Add eggs, one at a time, mixing well. Add flour and cinnamon, add to sweet potato mixture and mix well. Pour into greased pan. Bake at 300 until brownies test done, about 1 hour. Sprinkle with powdered sugar.