Preheat oven to 350 degrees. Grease a 9-inch springform pan. Using an electric mixer, cream the butter and sugar together. Add the eggs, one at a time. Add the sour cream. Sift the flour, baking powder, soda, cinnamon and salt together. Fold in the sifted flour mixture until barely incorporated. Stir in the vanilla and 1 cup strawberry jam. Mix the batter until fully incorporated. Pour the batter into the prepared pan. Bake for 30 minutes or until done. Cool the cake completely and slice into three layers. Using a pastry brush, spread each layer with the remaining jam.
Yield: 8 to 10 servings