Mix butter, margarine, baking powder, flour and powdered
sugar together until crumbly. Put in 9 X 13 inch pan. Bake at
350 degrees for 15 minutes. Remove from oven. Mix eggs,
sugar, lemon peel, lemon juice and baking powder, then pour
over flour mixture and return to oven. Bake at 350 degreesf for
25 minutes sprinkle lightly with powdered sugar while hot. Cut
into bars while hot.
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