Zynga’s ChefVille takes the No. 1 spot on our list of top growing Facebook apps by monthly active users this week, crossing 55.5 million players.

A few other Zynga games appeared on our list, including No. 2 Zynga Slingo, No. 16 FarmVille 2 and No. 19 CastleVille.

Titles on our list gained the most MAU of any apps on the platform, growing from between 500,000 and 8.8 million MAU, based on our AppData tracking service.

Top Gainers This Week

Name MAU Gain Gain % 1.  ChefVille 55,500,000 +8,800,000  + 19% 2.  Zynga Slingo 43,600,000 +7,900,000  + 22% 3.  War Commander 3,900,000 +1,500,000  + 63% 4.  Causes 8,100,000 +1,300,000  + 23% 5.  Static Iframe Tab 18,600,000 +1,100,000  + 6% 6.  Lost Jewels 1,600,000 +1,040,000  + 186% 7.  Bubble Epic 1,300,000 +1,020,000  + 364% 8.  Power Editor 970,275 +970,275  N/A 9.  Chase Community Giving 1,200,000 +920,000  + 329% 10.  Birthdays 16,100,000 +900,000  + 7% 11.  MiCalendario – Cumpleaños 9,800,000 +800,000  + 9% 12.  Zoosk 17,600,000 +800,000  + 5% 13.  Mis buenos amigos 1,000,000 +710,000  + 245% 14.  schoolFeed 20,200,000 +700,000  + 4% 15.  21 questions 6,400,000 +700,000  + 12% 16.  FarmVille 2 1,100,000 +640,000  + 139% 17.  Static IFRAME Tab : Pin Icon 3,200,000 +600,000  + 23% 18.  Instagram 30,900,000 +600,000  + 2% 19.  CastleVille 17,800,000 +500,000  + 3% 20.  Pinterest 18,800,000 +500,000  + 2%

Facebook’s Power Editor tool for advertisers came in at No. 8 this week because of a reporting glitch. Typically Facebook does not return MAU numbers for its own products, except occasionally when updates are made.

All data in this post comes from our traffic tracking service, AppData. Stay tuned for our look at the top weekly gainers by daily active users on Thursday, and the top emerging apps on Friday.