In a large microwave-safe bowl, combine the sugar and cornstarch. Then stir in the raspberries.
1/2 cup sugar, 1 tablespoon + 1 teaspoon cornstarch, 2 cups raspberries (fresh or frozen)
Microwave on high for 2 minutes; stir. Continue to microwave in 1 minute intervals for several minutes, or until the mixture has thickened. (It will be slightly more runny than a jam.) Set aside.
In a large mixing bowl, cream the butter and sugar. Add almond extract and eggs.
1 cup butter, 1 cup sugar, 1 1/2 teaspoons almond extract, 2 eggs
Stir in the flour and salt and mix well.
2 cups flour, 1/2 teaspoon salt
Spread 2/3 of the batter into a greased 9x13" pan.
Spread the raspberry filling on top. Drop the remaining batter by teaspoons on top of the filling.
Bake in a preheated 350 degree oven for 30-40 minutes, or until golden brown on top.
Stir together the powdered sugar and drizzle over the slightly cooled bars.
2/3 cup powdered sugar, 1 tablespoon water