Our Wines

As seekers of the truth, we strive to create wines that express the unique character of the site and soils in which they are grown. We are partial to wines made from mountain fruit, which led us to the mountain estate vineyards we own in the Diamond Mountain and Moon Mountain District AVAs. Our philosophy aligns perfectly with the viewpoint of our winemaker, Thomas Rivers Brown, who has crafted Theorem wines since our founding in 2012. Thomas’ philosophy of letting the site dictate the way a wine is produced has made him one of Napa Valley’s most respected winemakers. His wines have earned the highest acclaim, including more than twenty-five 100-point scores in Wine Advocate.

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  • Voir Dire

Voir Dire is the flagship wine of Theorem Vineyards. Produced from the oldest vines on our Diamond Mountain estate, this 100% Cabernet Sauvignon is a complex, captivating and timeless wine. Built to age, Voir Dire is a stunning reflection of soil and microclimate, full-bodied and supremely balanced with highly extracted black fruit flavors. The name is a legal term often translated as meaning “to speak the truth,” and the wine is a tribute to Jason Itkin’s work as an attorney as well as a reminder that the truth is often spoken after a glass (or two) of wine. To learn more about this captivating wine, please click here.

  • Hawk's Prey

Hawk's Prey is a Cabernet Sauvignon drawn from a block our family planted together in our Diamond Mountain vineyard in 2014. As we worked, numerous hawks circled above us, and we joked about who their prey might be. We also learned that hawks mate for life, and so we named this block Hawk's Prey. The young vines in this block give us a wine that is similar in flavor profile to Voir Dire, but Hawk's Prey is more vibrant and youthful, smoother and more approachable at a younger age. To learn more about this wine, please click here.

  • Sauvignon Blanc

Theorem Vineyard’s Sauvignon Blanc Moon Mountain District is the first wine from our Moon Mountain vineyard in Sonoma County, and it is also the first white wine we’ve produced. Our Sauvignon Blanc is a delicious ultra-premium wine filled with rich and vibrant aromas that leap from the glass and make you want to take another sip. It’s tasting notes reflect the incomparable qualities of our Moon Mountain vineyard estate that is perched above Sonoma Valley at 1,600 feet elevation. To learn more about this captivating wine, please click here.


Theorem Vineyard’s Diamond Mountain Merlot comes from a one-acre block that our family planted in 2014. The steep, hillside vineyard sits at 1,100 feet of elevation with ample sunlight, volcanic soils, and a unique micro-climate. From the moment this wine touches your lips, it shows power, structure, and personality. Our Merlot tastes amazing now and will continue to evolve for years to come. To learn more, please click here.


Theorem Vineyard’s Chardonnay comes from our estate vineyard at the top of Moon Mountain. The daily shift in temperatures from the Pacific Ocean and San Pablo Bay paired with volcanic soils creates a micro-climate that is ideal for growing the Chardonnay grapes that make this world-class white wine. Our Chardonnay is the style of white wine that we dreamed of creating when we first began Theorem Vineyards over six years ago. We are thrilled to share it with you. To learn more about this wine, please click here.