How Many Ounces Is a Serving of Grand Marnier?
                                
                                
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                                    4 min read                                
                            
                                According to the Centers for Disease Control and Prevention (CDC), a standard serving of 80-proof distilled spirits is 1.5 ounces. So, how many ounces is a serving of Grand Marnier? The answer depends on how you plan to enjoy this premium orange liqueur, whether it's sipped neat or mixed into a delicious cocktail.