Blueberry Streusel Coffee Cake

I had some fresh blueberries sitting in my fridge that I didn't know what to do with. I've been wanting to make a coffee cake for awhile since my husband loves coffee cake. So I decided to find a recipe for a coffee cake to make. So I went to my favorite recipe hunting ground - recipezaar and found one that looked good.

Ingredients

Cake
1 cup blueberries
1 tablespoon flour
1/2 cup butter, softened
2 cups flour
2 teaspoons baking powder
1/4 teaspoon salt
1 cup sugar
3/4 cup milk
1 egg

Streusel
1/2 cup sugar
1/3 cup flour
1/2 teaspoon ground cinnamon
1/4 cup butter, softened

Combine the blueberries and 2 T flour;
toss gently and set aside.

Combine 1/2 cup butter, 2 cups flour,
2 tsp baking powder, 1/4 tsp salt, 1 cup sugar
and 3/4 cup milk in a large bowl.

Beat 2 minutes at medium speed with an electric mixer.

Add egg; beat one minute.

Fold in blueberries.

Spread batter evenly in a greased and floured 9-inch square pan.

Mix 1/2 cup sugar, 1/3 cup flour, and 1/2 tsp cinnamon in a bowl;

cut in 1/4 cup butter until mixture resembles coarse meal.

Spread this mixture over the batter.

Bake at 350 degrees for 50 minutes.