You have to indicate whether you think that this sentence is an example of the comma splice.(True if it is a comma splice and False if not) This is a lovely dessert, you must give me the recipe one day.

True is correct because this is a comma splice. 'This is a lovely dessert, you must give me the recipe one day' contains two independent clauses joined only by a comma. 'This is a lovely dessert' and 'you must give me the recipe one day' are both complete sentences. They need stronger punctuation: a period, semi-colon, or coordinating conjunction.