Preheat the oven to 350 F. In a large mixing bowl, combine all the dry ingredients and set aside.

In a small saucepan, reduce the port over medium heat to 1/4 cup. Cool to room temperature.

Add the port and remaining ingredients, except the blueberries, to the dry mixture, one at a time, stirring constantly, until combined and smooth. Gently fold in the blueberries.

Lightly spray or wipe a 7 x 11-inch glass baking pan with vegetable oil. Pour the batter into the pan with and bake for 45 minutes, or until a toothpick inserted in the center comes out clean. Serve warm from the oven or cool to room temperature.