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		FOUNDED 1866

February 23, 2011

VIA EDGAR

Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

Re: BlackRock Small Cap Core Equity Portfolio, a series of BlackRock Funds^SM

(Nos. 33-26305 and 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 Prospectuses with respect to the Investor, Institutional and Service Shares of BlackRock Small Cap Core Equity Portfolio (the “Fund”), each dated January 28, 2011, as filed pursuant to Rule 497(c) under the Securities Act of 1933, as amended, on February 2, 2011 (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) 839-5583.

Very truly yours,

/s/ Ellen W. Harris

Ellen W. Harris

Enclosures

cc: Ben Archibald, Esq.

BlackRock Advisors, LLC

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