Both babies screaming at me and I need a cookie hunger is pretty compelling!
First off, nine months is really great for twins! You're doing wonderfully. I totally understand about feeling tired. I only had one but when I went back to work, I had to start supplementing formula at 9 months because I wasn't around to nurse her as much. I was honestly surprised how much energy I had and how much weight I dropped. I'm not saying you should cut back on nursing; that's something only you can decide. BUT I am saying, I sympathize with how you're feeling.
For my own weight loss, I started with making salads for lunch every day. I would make them in batches of three so that I would have them ready in the fridge and wouldn't have to worry about prepping them with my hands full. My very favorite salad is this one:
I use tangerines instead of oranges so that I just have to peel and slice them instead of segment them and I never have arugula so I just use a mixed salad.
Keep checking in! I'd love to hear how you're doing.