Final answer:
To double the original recipe, you need to use 5(1)/(2) pints of cream.
Step-by-step explanation:
To double the recipe, you need to double the amount of cream. The original recipe calls for 2(3)/(4) pint of cream, so to double that, you would multiply it by 2.
2 x 2(3)/(4) = 5(1)/(2) pint of cream
Therefore, you should use 5(1)/(2) pint of cream to double the recipe.