Step 1

Grease and flour a loaf or cake pan. Preheat oven to 375 degrees.

Step 2

For the topping, in a small mixing bowl, combine streusel ingredients. Blend with fork until crumbly. Set aside.

Step 3

In a small saucepan, heat half the blueberries and 1 tsp of sugar over medium heat. Occasionally mash the berries. Heat until berries turn into a slightly thick syrup. Remove from heat and set aside.

Step 4

In a small bowl, sift flour with baking powder and salt. In a medium bowl, mix together beaten egg and 3/4 cup sugar and 1/3 cup melted butter. Add milk and vanilla. Stir in flour mixture and mix well.

Step 5

Pour 1/2 the batter into a greased and floured pan. Sprinkle with remaining blueberries and half the streusel topping.

Step 6

Then top with remaining batter. Using a spoon, drizzle the blueberry syrup over the top, and gently swirl with a toothpick to slightly mix in. Top with remaining streusel.

Step 7

Bake at 375° for 35 to 45 minutes, or until cake tests done. Partially cool in pan on wire rack.

Step 8

Cut coffee cake and serve.