Marbled New York-Style Cheesecake

INGREDIENTS

• 1 1/4 cups graham cracker crumbs
• 1/2 cup finely chopped walnuts
• 1/4 cup sugar
• 1/3 cup butter or margarine, melted
• 4 (8 ounce) packages cream cheese, softened
• 1 (14 ounce) can EAGLE BRAND® Sweetened Condensed Milk
• 4 eggs
• 2 tablespoons Pillsbury BEST® All Purpose Flour
• 1 tablespoon vanilla extract
• 3 (1 ounce) squares semi-sweet baking chocolate, melted