All About Shake Shack's Secret Menu: Peanut Butter & Bacon! By: Benzinga via Benzinga January 31, 2015 at 13:09 PM EST Shares of Shake Shack Inc (NYSE: SHAK)on Fridayclosed at $45.90 -- up 118 percent ($24.90) -- after one of the ... Read More >> Related Stocks: Noodles & Company Red Robin Gourmet Burgers Inc Renaissance International IPO ETF Shake Shack Inc Sonic Cp