Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make cornflake cookies [title] Preheat the oven to 190ºc/350ºf. [step] Prepare two baking trays (sheets) by lining with baking (parchment) paper or a silicone baking sheet. [title] Place the butter, sugar and vanilla into a large mixing bowl. [step] Beat until a soft, creamy and light mixture forms.

Ending1: Add the flour, sugar and baking powder. Beating these together it will probably take a bit awhile. Ending2: [title] Add the flour and place it into the mixer 1 cup at a time until smooth. [step] Beat for 15 to 30 seconds more. Ending3: [title] Beat in the eggs one at a time. [step] Continue beating until the ingredients are well combined. Ending4: [substeps] You can also use margarine, coconut oil or non-fat cooking milk as preferred. [title] Transfer the dough to the prepared trays.

Answer format: ending1/ending2/ending3/ending4