cream together the butter and 3/4 c. sugar. blend egg into creamed mixture. in another bowl sift together flour, baking powder and salt. add flour mixture alternating with milk. gently fold in blueberries. pour into greased 8 x 8 square pan. sprinkle with crumb topping (recipe below). bake @ 375 for 40-45 minutes.
in a small bowl mix together sugar, flour and cinnamon. with a pastry blender cut the butter into sugar mixture untill mixture resembles coarse meal.
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