Blueberry Tea Cake

This recipe is from my Nana.

Cake mixture:
1/4 c. margarine
3/4 c. sugar
1 egg
1/2 c. milk
2 c. flour
2 tsp. baking powder
1/2 tsp. salt
2 c. blueberries

Crumb mixture:
1/2 c. sugar
1/4 c. flour
1/2 tsp. cinnamon
1/4 c. margarine

Cream margarine and sugar together, then add egg and milk. Combine flour with baking powder and salt. Add the dry ingredients to the wet ingredients slowly and mix well. Fold in blueberries. Pour into 9" square greased & floured baking pan.

Combine ingredients for the crumb mixture, and spronkle over the cake. Bake in a preheated oven at 350˚F until done, probably around 30-40 minutes.