Premium Coffee & Handmade Donuts

Grindstone Coffee & Dounts on COVID-19: As we are all impacted with change to our daily lives due to the novel virus (COVID-19), Grindstone will remain open and continue to serve and support our community. We are taking extra precautions to ensure the safety and health of our customers and employees by implementing extra sanitary measures in our store. As well as offering our usual in-store take out service, we will provide curbside pickup outside of our shop. Please give us call at
(631) 808-3370 to place an order for in-store pickup or curbside pickup. 

Please stay safe and healthy,

Grindstone team






Call ahead to place an order and to hear about our current selection of donuts. We are currently offering in-store pickup and curbside pickup. 


Order and pay right here, then present your order number to our staff to receive your order of the Hamptons' best coffee and donuts. 



Open year-round in Sag Harbor since 2016.  We make fresh brioche and cake donuts daily, using only the finest ingredients.  Our small batch process takes two days to complete, but when they're done, you know you have something special.  Our glazes and fillings are all made in house from locally-sourced organic ingredients.  

We take our coffee just as seriously.  We sell and brew premium coffee from local and nationally recognized roasters, prepared by our highly skilled barista staff.  A full espresso menu, specialty teas, and a never ending supply of cold brew will be the perfect compliment to any box of donuts. 



Cakes are fine, but a donut the size of a spare tire is obviously better. We make giant custom brioche donuts for any occasion. Just give us a call two days in advance and we'll make all of your wildest dreams come true. 

©2020 Sag Coffee LLC.