Cookie Dough Fudge

Grease an 8" or 9" square pan with cooking spray and line with parchment paper. In a large bowl using a hand mixer, beat butter, sugar, and vanilla until smooth.  Place flour in a microwave-safe bowl and microwave until flour is hot, about 1 minute.  Add flour and salt to butter mixture and beat until combined. Stir in 1 cup mini chocolate chips. In a large bowl, mix together sweetened condensed milk and melted white chocolate, then fold into cookie dough mixture. Pour into prepared pan and top with remaining 1/4 cup mini chocolate chips. Refrigerate until fudge is firm, about 2 hours. Remove from pan by lifting edges of parchment paper and cut into squares.