Preheat oven to 300F degrees. Line a 9 x 9 inch baking pan with aluminum foil, leaving enough overhang on the sides. Spray with non-stick cooking spray. Set aside.
Using a food processor, pulse Oreo cookies and butter together until crumbly.
Press cookie crumbs onto bottom of prepared pan. Set aside.
Using an electric or stand mixer, beat cream cheese until light and fluffy.
Add condensed milk and beat until smooth.
Add eggs and vanilla extract. Mix well.
In a small bowl, coat 1/2 cup of mini chocolate chips in the flour. Mix coated mini chocolate chips into cream cheese mixture.
Pour cream cheese mixture into baking pan. Sprinkle the remaining (non-coated) mini chocolate chips on top of cream cheese mixture.
Bake for 1 hour or until cheesecake springs back when touched. Let cool at room temperature. Chill in fridge for at LEAST 1 hour before cutting into squares.
Notes
Store cheesecake bars in a covered container for up to 7 days in the refrigerator. Cheesecake bars can also be frozen up to 2-3 months. Thaw overnight in the refrigerator before serving.