Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make langue de chat biscuits [title] Preheat the oven to 220ºc/425ºf. [step] Prepare the baking tray (sheet) by greasing or covering with parchment paper. [title] Place the sugar, flour and vanilla sugar into the mixing bowl. [step] Stir to combine.

Ending1: [title] Cream the butter, milk and eggs in a separate small bowl. [step] Beat the eggs with a whisk on medium-high speed. Ending2: [title] Pour the flour in, and stir again. [step] Adding the sugar and vanilla creates an assistant, who will combine all ingredients except for 5 spoonfuls of the baking mixture and add to the flour in a separate bowl. Ending3: [title] Whisk the 3 egg whites together until stiff. [step] Fold them into the dry mixture gently. Ending4: [title] Add the flour and mix until fully incorporated. [step] Be sure to stir every five minutes to ensure even mixing.

Answer format: ending1/ending2/ending3/ending4