Grease 13x9 baking pan. Stir sugar and butter in heavy large saucepan
over medium-low heat until sugar and butter melt. Add liqueur and
espresso powder and whisk to blend. Cool. Whisk eggs into sugar
mixture. Sift flour, baking powder and salt into medium bowl. Stir dry
ingredients into batter Stir in must and chocolate chips. Pour in
prepared pan and bake 35-40 minutes.