SIDLEY AUSTIN LLP 787 SEVENTH AVENUE     NEW YORK, NY 10019 (212) 839 5300 (212) 839 5599 FAX	BEIJING BOSTON BRUSSELS CENTURY CITY CHICAGO DALLAS GENEVA	HONG KONG HOUSTON LONDON LOS ANGELES NEW YORK PALO ALTO SAN FRANCISCO	SHANGHAI SINGAPORE SYDNEY TOKYO WASHINGTON, D.C.
		FOUNDED 1866

December 10, 2015

VIA EDGAR

Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

Re: BlackRock Multi-Manager Alternative Strategies Fund, a series of BlackRock Funds^SM

Securities Act File No. 33-26305; Investment Company Act File No. 811-05742    

Ladies and Gentlemen:

On behalf of BlackRock Funds^SM, attached for filing are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in the Supplement to the Investor and Institutional Shares Prospectus of BlackRock Multi-Manager Alternative Strategies Fund (the “Fund”) dated December 29, 2014, as amended July 29, 2015, as filed pursuant to Rule 497(e) under the Securities Act of 1933 on November 24, 2015 (the “497 Filing”). The purpose of this filing is to submit the 497 Filing in XBRL for the Fund.

Any questions or comments on the 497 Filing should be directed to the undersigned at (212) 839-8615.

Very truly yours,

/s/ Jesse C. Kean

Jesse C. Kean

Enclosures

cc: Benjamin Archibald, Esq.

BlackRock Advisors, LLC

Sidley Austin (NY) LLP is a Delaware limited liability partnership doing business as Sidley Austin LLP and practicing in affiliation with other Sidley Austin partnerships.