Exhibit 11

July 19, 2007

BlackRock Large Cap Series Funds, Inc.
800 Scudders Mill Road
Plainsboro, New Jersey 08536

Ladies and Gentlemen:

We have acted as special Maryland counsel to BlackRock Large Cap Series Funds,
Inc., a Maryland corporation (the "Corporation"), in connection with that
certain Agreement and Plan of Reorganization, dated as of July 16, 2007 (the
"Agreement"), among Master Large Cap Series LLC, the Corporation, individually
and with respect to BlackRock Large Cap Core Fund, a separate series of the
Corporation ("Large Cap Core"), BlackRock FundsSM, a Massachusetts business
trust ("BlackRock Funds"), individually and with respect to BlackRock Investment
Trust, a separate series of BlackRock Funds ("Investment Trust"), pursuant to
which Large Cap Core will acquire all of the assets of Investment Trust in
exchange for the assumption of certain stated liabilities of Investment Trust
and the issuance to Investment Trust of certain shares of common stock of Large
Cap Core (the "Shares") having a net asset value equal to the value of the
assets acquired by Large Cap Core reduced by the amount of the liabilities of
Investment Trust assumed by Large Cap Core. This opinion is being furnished in
connection with the registration under the Securities Act of 1933, as amended
(the "Act"), by the Corporation of the Shares on Form N-14 (Securities Act File
No. 333-143532) filed with the Securities and Exchange Commission on the date
hereof (the "Registration Statement").

We have examined such records, certificates and documents as we deemed necessary
for the purpose of this opinion. Based on that examination, we advise you that,
subject to the approval of the Agreement by the Board of Trustees of BlackRock
Funds and by the shareholders of Investment Trust, in our opinion the Shares
have been duly and validly authorized and, when issued upon the terms set forth
in the Agreement, will be legally issued, fully paid and non-assessable.

We hereby consent to the filing of this letter as an exhibit to the Registration
Statement. In giving our consent, we do not thereby admit that we are in the
category of persons whose consent is required under Section 7 of the Act or the
rules and regulations of the Securities and Exchange Commission thereunder. We
express no opinion as to the laws of any state or jurisdiction other than, and
our opinion expressed herein is limited to, the laws of the State of Maryland.
Our opinion expressed herein is limited to the matters set forth in this letter
and no other opinion should be inferred beyond the matters expressly stated.

Very truly yours,

Miles & Stockbridge P.C.


By: /s/ Christopher R. Johnson
    --------------------------
    Principal