For the barbecue sauce, in a medium saucepan stir together the packed brown sugar, cornstarch, and chili powder. Stir the tomato sauce, vinegar, catsup, and dark corn syrup into the brown sugar mixture in the saucepan. Add 1/2 cup water. Bring the mixture to boiling. Reduce the heat to low and simmer, uncovered, for 30 minutes, stirring occasionally. Stir the orange liqueur or orange juice into the tomato sauce mixture. Return the mixture to boiling. Reduce the heat. Simmer the sauce, uncovered, for 5 minutes more. Baste the barbecue sauce over your favorite meat or poultry about the last quarter of the grilling or broiling time. Heat through any additional sauce and pass it to spoon over each serving. Store any remaining barbecue sauce, covered, in the refrigerator. Makes about 3 cups. Nutrition information per 1/4 cup sauce: 32 cal. (O% from fat), 0 g fat, 0 mg chol., 1 g pro., 34 g carbo., 0 g dietary fiber, 324 mg sodium. sauce18