Chocolate streusel-topped cookie bars with a creamy cheesecake filling.

Chocolate Streusel Bars

1 3/4 cups all-purpose flour
1 1/2 cups powdered sugar
1/2 cup unsweetened baking cocoa
1 cup cold butter or margarine
1 (8-ounce) package cream cheese
1 (14-ounce) can sweetened condensed milk
1 large egg
2 teaspoons vanilla extract
1/2 cup walnuts, chopped

1. Preheat oven to 375°F (190°C).
2. In a large bowl, combine flour, powdered sugar, and unsweetened baking cocoa. Cut in cold butter until crumbly; reserve 2 cups of the mixture. Press the remainder onto the bottom of a 13 x 9-inch baking pan.
3. Bake for 15 minutes.
4. In a large bowl, beat cream cheese, sweetened condensed milk, egg, and vanilla until fluffy. Pour over the prepared crust.
5. Combine chopped walnuts with the reserved crumb mixture. Sprinkle over the cream cheese layer.
6. Bake for 25 minutes. Cool before cutting into bars.

Makes 24 bars.