The Surf n Turf DLC levels are a bit harder than the base game to get 3 stars on, but it's doable.
As long as you keep an eye on the biggest bottleneck in the level (plates, mixers, frying pan) and use them as efficiently as possible, you'll clear 3 stars no problem.
I just did it in World 1 in co-op last night, we had the most trouble with level 1-1.
Here's a video guide (not mine):