Rhubarb Cake Recipe form the 1970's - Is it GenXcellent?

Rhubarb is in season from spring through summer and makes wonderful pies, jams, spreads, and desserts. This cake Generation X era recipe is from 1972 and even though the rhubarb flavor isn't pronounced, it makes a pretty great cake.
You will need:
1/2 C butter
1 1/2 C brown sugar
1 egg
2 C sifted flour
1 tsp baking soda
1/4 tso salt
1 C buttermilk
1 1/2 C finely chopped rhubarb
and
1/4 C sugar w/1tsp cinnamon for the topping
Bake at 350 for 30-35 min
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