Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make an amaretto sour [title] Fill a cocktail shaker halfway with ice cubes. [step] This doesn't have to be done perfectly. [title] Pour your desired amount of amaretto into the shaker.

Ending1: [title] Add about a third of your vodka and espresso ice cubes to the top of the shaker. [title] Shake the shaker until all of the ice has dissolved. Ending2: [step] Some people insist on making an amaretto sour with one part amaretto and one part sweet and sour mix, while others make it with two parts amaretto and one part sweet and sour mix. It depends on what you want: more of a sweet and sour flavor, or more of a nutty, creamy flavor. Ending3: [title] Shake the liquid mixture until you run out of ice. [title] Add ice cubes and shake the shaker gently. Ending4: [step] Here is how it goes : [substeps] 1/2 tsp. ( 1.25 g) bourbon added [title] Shake and serve.

Answer format: ending1/ending2/ending3/ending4