Cream butter and 1 cup of brown sugar until light and fluffy
½ cup butter, 2 cups brown sugar
Add and beat thoroughly.
1 egg, 1 tsp vanilla
Sift
2 cups all-purposed flour, 1 tsp soda, ½ tsp salt
Add to creamed mixture in thirds alternately with buttermilk beating until smooth after each addition.
1 cup buttermilk
Fold in
2 cups rhubarb
Turn into greased 13 x 9 x 2 pan.
Sprinkle with remaining 1 cup of brown sugar and pecans on top.
Bake at 350° for 45 minutes.