Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make biscotti [title] Soften the butter on the counter. [step] Remove the eggs to warm to room temperature while the butter softens. [title] Preheat your oven to 300 degrees fahrenheit (149 celsius).

Ending1: [title] Quickly add powdered sugar to the pan to melt the butter. [step] When the butter is melted enough, add a pinch of salt. Ending2: [title] Remove the pinch pan from the refrigerator. [step] Using a butter knife, lightly slice the softened butter into 4 equal parts. Ending3: [title] Add the sugar and butter to your mixing bowl. [step] Cream the mixture it at medium speed until it is very light. Ending4: [title] Crack the eggs and mash them. [step] You can also press the eggs into a bowl and mash it into a paste.

Answer format: ending1/ending2/ending3/ending4