Blueberry Mystery Cake

I was going through my recipe cards and found this recipe from my aunt.  Try it with fresh blueberries or frozen ones work too.

Blueberry Mystery Cake

Ingredients

4 cups fresh or frozen blueberries
juice of 1/2 lemon
1 1/2 cup sugar
6 Tbsp butter
1 cup milk
2 cups flour
2 tsp baking powder
1/2 tsp salt

1 cup sugar
2 Tbsp cornstarch
1/2 tsp salt
1 1/2 cups boiling water

Directions

Preheat oven to 350 degrees

Place blueberries evenly in bottom of buttered 9x13 pan.  Sprinkle with lemon juice.

Cream sugar and butter together.  Mix flour, baking powder and salt in a bowl.  Add milk alternately with flour mixture.  Mix well.

Pour over blueberries, smoothing to cover.

Combine the 1 cup sugar, cornstarch and salt.  Sprinkle over the batter.  Pour boiling water over all.

Bake 45-50 minutes.