input question: How do I add the butter to the biscuit crumbs when making chocolate nutella tart?

output answer: Add in melted butter and process in the food processor until the butter is well incorporated and the crumbs look like wet sand.

input question: how do you exit out the browser on a macbook pro.?

output answer: go to the top of the browser page, and press the red circle that appears on the left hand side.

input question: To peel the papery skin from ginger.

output answer:
Use a peeler to carefully peel the skin away.