Heat oven to 350°F. In large bowl with electric mixer, beat base ingredients on low speed until crumbly. Press mixture evenly in bottom of ungreased 13x9-inch pan. Bake 20 to 30 minutes or until light golden brown.
Meanwhile, in large bowl with wire whisk, lightly beat eggs. Beat in remaining filling ingredients except lemon juice until well blended. Beat in 1/4 cup lemon juice.
Remove partially baked base from oven. Pour filling evenly over warm base.
Return to oven; bake 25 to 30 minutes longer or until top is light golden brown. Cool completely, about 1 hour.
In small bowl, mix 1 cup powdered sugar and enough lemon juice for desired spreading consistency until smooth. Spread glaze over cooled bars. Cut into bars.