Preheat oven to 350 degrees F. Heavily butter a 9- x 13-inch baking pan.
In a large mixing bowl, beat together butter and sugar until well blended. Beat in eggs, orange zest, and vanilla extract. Beat in flour and baking powder until well blended. Stir in chopped dates and chopped walnuts. Batter will be very thick at this point.
Spread mixture onto bottom of prepared baking dish. Bake for approximately 25 to 30 minutes or until the top is golden brown. Remove from oven and let cool on a wire cooling rack.
When cool, spread Lemon Glaze over the top. Cut either into bars or squares.
Makes about 48 bars.
In a medium-size bowl, mix the lemon juice and confectioner's sugar together so that it is of spreading consistency. Spread the glaze on the uncut cooled cookies.
Orange Date Nut Bars Recipe: https://whatscookingamerica.net/cookie/orangedatecookies.htm