Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make chocolate drop cookies [title] Preheat the oven to 350 ° f (180 ° c) and line a baking sheet with parchment paper. [title] Place the butter and brown sugar in a large mixing bowl. [step] Using a handheld mixer or a stand mixer with a paddle attachment, beat the butter and sugar until the ingredients are light and fluffy.

Ending1: This can take approximately 2 to 3 minutes. [substeps] If you don't have an electric mixer, you could use a hand mixer. Ending2: [title] In another large mixing bowl, beat the eggs and vanilla extract. [step] Beat the eggs and the vanilla extract until well blended. Ending3: Your mixer should be set on medium speed. [title] Beat in the egg, milk, vanilla and cooled melted chocolate until the ingredients are just combined. Ending4: [title] Set the oven to 350 ° f (180 ° c) and line a baking sheet with parchment paper. [step] Using a handheld mixer or a stand mixer with a paddle attachment, beat the butter and sugar until the ingredients are light and fluffy.

Answer format: ending1/ending2/ending3/ending4