Exhibit J(1)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Post-Effective Amendment to Registration Statement No. 33-73824 on Form N-1A of our reports dated (i) November 28, 2022, relating to the financial statements and financial highlights of MassMutual Total Return Bond Fund, MassMutual Strategic Bond Fund, MassMutual Diversified Value Fund, MassMutual Fundamental Value Fund, MM S&P 500^® Index Fund, MassMutual Equity Opportunities Fund, MassMutual Fundamental Growth Fund, MassMutual Blue Chip Growth Fund, MassMutual Growth Opportunities Fund, MassMutual Mid Cap Value Fund, MassMutual Small Cap Value Equity Fund, MassMutual Small Company Value Fund, MassMutual Mid Cap Growth Fund, MassMutual Small Cap Growth Equity Fund, MassMutual Overseas Fund, MassMutual Select T. Rowe Price International Equity Fund, MM Equity Asset Fund, MassMutual Select T. Rowe Price Bond Asset Fund, MassMutual Select T. Rowe Price Emerging Markets Bond Fund, MassMutual Select T. Rowe Price Large Cap Blend Fund, MassMutual Select T. Rowe Price Limited Duration Inflation Focused Bond Fund, MassMutual Select T. Rowe Price Real Assets Fund, MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, and MassMutual Select T. Rowe Price U.S. Treasury Long-Term Index Fund, and (ii) December 2, 2022, relating to the financial statements and financial highlights of MassMutual 20/80 Allocation Fund, MassMutual 40/60 Allocation Fund, MassMutual 60/40 Allocation Fund, MassMutual 80/20 Allocation Fund, MassMutual RetireSMART^SM by JPMorgan In Retirement Fund, MassMutual RetireSMART^SM by JPMorgan 2020 Fund, MassMutual RetireSMART^SM by JPMorgan 2025 Fund, MassMutual RetireSMART^SM by JPMorgan 2030 Fund, MassMutual RetireSMART^SM by JPMorgan 2035 Fund, MassMutual RetireSMART^SM by JPMorgan 2040 Fund, MassMutual RetireSMART^SM by JPMorgan 2045 Fund, MassMutual RetireSMART^SM by JPMorgan 2050 Fund, MassMutual RetireSMART^SM by JPMorgan 2055 Fund, MassMutual RetireSMART^SM by JPMorgan 2060 Fund, MassMutual Select T. Rowe Price Retirement Balanced Fund, MassMutual Select T. Rowe Price Retirement 2005 Fund, MassMutual Select T. Rowe Price Retirement 2010 Fund, MassMutual Select T. Rowe Price Retirement 2015 Fund, MassMutual Select T. Rowe Price Retirement 2020 Fund, MassMutual Select T. Rowe Price Retirement 2025 Fund, MassMutual Select T. Rowe Price Retirement 2030 Fund, MassMutual Select T. Rowe Price Retirement 2035 Fund, MassMutual Select T. Rowe Price Retirement 2040 Fund, MassMutual Select T. Rowe Price Retirement 2045 Fund, MassMutual Select T. Rowe Price Retirement 2050 Fund, MassMutual Select T. Rowe Price Retirement 2055 Fund, and MassMutual Select T. Rowe Price Retirement 2060 Fund, each a series of MassMutual Select Funds, appearing in the Annual Reports on Form N-CSR of MassMutual Select Funds for the year ended September 30, 2022, and to the references to us under the headings “Financial Highlights” in the Prospectuses and “Independent Registered Public Accounting Firm,” and “Experts” in the Statements of Additional Information, which are part of such Registration Statement.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

January 31, 2023