Nicknamefail - if you are breastfeeding I suppose now is a good time to work out what 'plans' you have post 12 months? Do you want to continue bf beyond 12 months, or stop?
If you plan to let baby self wean and/or feed until a certain timeframe beyond 12 months, I wouldn't worry about implementing additional food or snacks to replace a feed. Baby will eventually drop on their own accord.
You'd be surprised how much they develop their feeding habits from 8-9 months to 12 months. She will increase her solid intake and may or may not reduce milk intake. I have friends who quite happily dropped bf in place of lots of food and others who loved booby milk lots 
Milk is their main source of nourishment until 12 months but that doesn't mean it stops being beneficial after 12 months.
You can get to a stage whereby you offer food first and milk second (normally milk first and food second when doing BLW) so just read your dd's signs.
My experience: I started to notice dd wasn't as satisfied after a milk feed around 11 months so would give a snack then. I probably fed several snack type meals throughout the day anyway, more so than set meal times like friends of mine (I'm not a routine-type person and we'd be out and about so she'd eat when I ate, literally). She's still fed on demand now (22 months) but loves her solid food so we feed each morning and very occasionally during the day (sometimes not at all).
As a side not to your night time feeds: google Dr Jay Gordon sleep pattern if you want to night wean after 12 months. A really gentle method I used at 13 months. A good read now too if you want to have a look 
If you want to actively reduce breastfeeds by 12 months, then yes, giving snacks around the time you'd feed is the way to go (crackers with cheese spread, fruit sticks, banana, raisins etc) and then still let her have bf if she's still hungry.