Sift together flour, baking powder, and cinnamon.
Stir in blueberries.
In mixing bowl cream margarine and sugar together; beat in egg and vanilla.
Add flour-berry mixture alternately with milk; beat with spoon until blended.
Fold in nuts.
Drop by heaping teaspoonsful onto greased cookie sheet, 2 inches apart.
Bake at 375 degrees for 12-14 minutes, until lightly browned and firm.