Step 1

Begin by preheating your oven to 350 degrees F. Spray an 8x8 inch (or equivalent) pan with baking spray. Set aside.

Step 2

In a bowl cream together the butter and 1/2 cup sugar. Add in the salt and vanilla, and mix again to combine.

Step 3

Next, separate the egg yolks from the egg whites. Reserve the whites. Add the egg yolks to the butter and sugar mixture. Beat to combine.

Step 4

In a small bowl, whisk together 1 1/2 cups flour with the baking powder. Add this mixture to the egg yolk mixture alternating with the milk. Coat the blueberries with 1 tablespoon of flour. Add to the batter and fold gently to combine.

Step 5

In a medium bowl, beat the egg white to form soft peaks. Add in 1/4 cup of sugar slowly, and beat to form stiff peaks. Fold this into the batter.

Step 6

Pour the batter into the prepared ban. Sprinkle the top with 1 tablespoon sugar.

Step 7

Bake for 45-50 minutes or until a toothpick inserted near the center comes out clean.