To Make the Crust: Preheat oven to 350°F. Spray a jelly roll pan with cooking spray or grease using butter. Set aside.
In a medium size mixing bowl use a whisk to sift together flour, powdered sugar and salt. Using an electric mixer or a pastry blender, cut the butter into the dry ingredients until it resembles coarse crumbs.
Press firmly and evenly into pan. Bake for 20-22 minutes or until lightly golden.
To Make the Filling: Meanwhile, using an electric mixer, beat together eggs, corn syrup, granulated sugar, brown sugar, butter and vanilla in a large bowl until well blended. Stir in pecans.
Spread evenly over crust. Bake 25 minutes at 350°F until filling is firm around the edges and slightly firm in center. Cool completely on wire rack.
Cut into 48 even pieces. Store in an airtight container at room temperature for up to 5 days or chilled for one week.
Notes
Adjust the baking time and bake these bars until the edges are golden and the center shows very slight movement when gently shaken. If you underbake, the centers could be runny.
Store these pecan pie bars in an airtight container at room temperature for up to one week.
These bars can also be frozen for up to 2 months. Separate layers with wax paper.