Good-Cooking - Blueberry Coffeecake

Ingredients

• 1 1/4 to 1 1/2 cups blueberries
• 1/3 cup granulated sugar
• 2 tablespoons cornstarch
• 1/2 cup butter or margarine
• 1 cup granulated sugar
• 2 eggs
• 2 cups flour
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 teaspoon almond extract
• 1 (8 ounce) container sour cream
• 1/2 cup nuts
• 3/4 cup confectioners sugar' sugar
• 1 tablespoon water
• 1/2 teaspoon almond extract