1 (10 ounce) package butterscotch chips
1/2 cup butter
2 cups graham cracker crumbs
8 ounces cream cheese
1 (14 ounce) can sweetened condensed milk
1 teaspoon vanilla extract
1 cup chopped pecan
In a medium saucepan, melt butterscotch chips and butter over low heat. Remove from heat. Stir in cracker crumbs and mix well. Reserve 2/3 cup mixture. Press remainder firmly into bottom of a buttered 13 x 9-inch ovenproof glass baking dish, making a uniform layer.
Heat oven to 325 degrees F.
In a large bowl, beat cream cheese until light and fluffy. Beat in sweetened condensed milk, vanilla extract and egg; fold in nuts. Pour into prepared pan. Scatter reserved crumb mixture evenly over top.
Bake for 25 to 30 minutes or until cake tester comes out clean.
Cool to room temperature, then chill.
Cut into 1 1/2 x 2-inch bars to serve.