You have to give it time to get out of the diet mentality. Especially at this time of year. Put the scale away for a while and stick to plan. As long as you stick to plan try not to worry about the scale, at least until spring. The weight was put on with time and will take time to come off. You need to get used to feeling "normal". Good for you that you didn't start a binge by starting with the brownies. Before, you would have so think what a big step that is.

The obsession with sweets will pass. Part of it is the time of year and an inborn survival chemistry. Part of it is the disbelief that you can have sweets and still lose. You need time to acclimate. Try to think of what you really want for RM. Make RM special not just a gorge on sweets, include your favorite veggies or drink.