Let's solve this problem step-by-step.
To begin with, let's write some equations based on the information provided in the problem and then solve accordingly as displayed below:
One batch = 2 × 12 = 24
Therefore:
Two batches = 24 × 2 = 48
68 > 48
68 > Two batches
Therefore, it is reasonable to say that Britney will need more than two batches of dough.