Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to cook austrian chocolate and walnut tart [title] Beware any hands! [step] Since tart dough must be cold, like the ingredients, keep your warm hands out of the mixture. [title] Mix the flour, sugar and cocoa powder. [step] Add butter, cut into cubes.

Ending1: The cocoa powder helps to fluff up the dough rather than squash. There you have it! Next is the flour. Ending2: [title] Mix the ingredients until that you get a sandy texture composition. [step] Do not mix a lot, just enough to heat the butter. Ending3: [title] Add 2 cups (500 ml) of water. [step] Stir slowly, because boiling water can make the dough hard and rubbery. Ending4: [title] Thoroughly combine as much of the wet and brown sugar as possible and then add the chocolate. [step] Cover with a greased parchment paper to keep the butter in if the butter melted.

Answer format: ending1/ending2/ending3/ending4