Mix together 1 Tablespoon of the sugar and cinnamon, and set aside. Combine the remaining sugar, the flour, baking powder, and the cardamom. Cut in the butter until the mixture resembles corn- meal. Beat the egg, combine with the cream or milk, and add to the batter. Stir in until combined.,then stir in the blueberries. Spoon into a buttered 8 inch pan. Sprinkle the sugar and cinnamon mixture over the top. Bake in a preheated 375 oven for 20 to 25 minues. Serves 8.
From Horticulture Magazine,1985.
This is very similiar to a coffee cake served in Peggys Cove, Nova Scotia. Do not omit the cardamom;that it what gives the cake a unique flavor.