they're from this book:
Which is full of really good recipes. I also love the mini chip snowball cookies. Apparently the book is only one cent... but in my cookbook library, it is a total classic!
swirl-of-chocolate cheesecake triangles
from Nestle Tollhouse best-ever cookies
2 cups graham cracker crumbs
1/2 cup (1 stick) butter or margarine, melted
1/3 cup granulated sugar
2 packages (8 oz each) cream cheese, softened
1 cup granulated sugar
1/4 cup all-purpose flour
1 1/2 cups (12 fl. oz can) Evaporated milk
1 T vanilla
Combine crumbs, butter, and granulated sugar in medium bowl; press into bottom of ungreased 13x9 inch baking pan
Beat cream cheese, sugar, and flour in large mixer bowl until smoth. Gradually beat in evaporated milk, eggs, and vanilla extract.
Microwave morsels in medium bowl in Hugh power for 1 min, stir. Microwave at additional 10 to20 second intercals, stirring until smooth.
Stir in 1 cup cream cheese mixture into chocolate. Pour remaining cream cheese mixture over crust. Pour chocolate mixture over cream cheese mixture. Swirl mixtures with spoon, pulling plain cream cheese mixture up to surface. Bake in preheated 325 degree oven for 40-45 min. or until set. Cool in pan to room temp on wire rack. Chill until firm. Cut into squares. Cut each square in half diagonally to form triangles. Makes 2 1/2 dozen.