Raspberry Butter Bars

Ingredients:

3 cups frozen raspberries
1/2 cup sugar
2 tablespoons cornstarch
1 tablespoon butter
Nonstick cooking spray
1 3/4 cups butter, softened
1 1/2 cups sugar
5 eggs
1 teaspoon vanilla
3 cups all-purpose flour

Directions:

In a mediums saucepan, combine 3 cups raspberries, 1/2 cup sugar, the cornstarch and 1 tablespoon butter. Cook and stir over medium until thickened and bubbly. Remove from heat. Cool.
In a large bowl, beat the 1 3/4 cups butter with an electric mixer on medium to high speed for 30 seconds. Beat in the remaining 1 1/2 cups sugar, scraping sides of bowl. Beat in eggs, then, vanilla. Beat in as much of the flour as you can with the mixer. Stir in any remaining flour.
Spread dough evenly into prepared pan. Spoon fruit mixture atop batter and swirl gently together, but do not over mix.
Bake in a 325 degrees F oven about 40 minutes or until edges are lightly browned and set (center may still appear a little undone). Cool in pan on a wire rack.