Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make chocolate chip cookie dough truffles [title] Cover a baking sheet with parchment paper or spray it with baking oil. [title] Cream the butter and sugar in a large bowl until light and fluffy. [title] Pour in the vanilla extract.

Ending1: [step] Beat on medium speed with a wooden spoon. [title] Divide the dough into individual mountain balls or apples (one should be smaller than the other, as the bigger the balls, the smoother your chocolate chip cookie dough will be. Ending2: [step] Stir in the vanilla and mix again. [title] Mix the shortening, egg mixture, cornstarch and flour in a mixing bowl with your mixer. Ending3: [step] Beat it into the sugar so that there are no lumps left. [title] Beat in the baking powder and salt. Ending4: [title] Fold in the flour and add the milk. [step] Blend on low speed until the cookie dough holds together and there are no flour streaks.

Answer format: ending1/ending2/ending3/ending4