Sour Cream Coffee Cake

From the kitchen of Mrs. Mary Letterman, Raleigh

1 cup butter
1 cup sour cream
1 cup sugar
3 eggs
2 cups plain flour
2 teaspoons baking powder 1/2 teaspoon salt
1/2 teaspoon baking soda
1 teaspoon vanilla
1/2 cup crushed pecans
1 cup brown sugar
1 teaspoon cinnamon

Cream together sugar and butter. Add eggs one at a time. Add vanilla. Sift together flour, baking powder, salt and baking soda. Add dry mixture to creamed mixture alternating with the sour cream. Pour into greased baking dish. Mix together crushed pecans, brown sugar and cinnamon and swirl with fork into mixture. Bake at 350 degrees for 45 minutes.