I think it depends on how many calories you have to add. I started out by just adding 200 calories to the evening; but as I found I had to add more and more calories, I needed to spread them around throughout the day. My maintenance level ended up about 50% more calories than I was eating to lose weight, so that was quite a bit of adjustment; and it happened 100 and 200 calories at a time.
Fair warning: During maintenance, I've had to adjust my calories up and down several times. Remembering how I adjusted up and just reversing part of that out has worked well for going down.
"Discipline is remembering what you want. " - David Campbell
Max Lifetime Weight, 221
SP Start Weight, 196.6
Initial SP Goal, 175
Current Goal on Ticker, 162
| current weight: 0.4 over